Here are a few web sites with information about Star Trek comics.
I salute the folks who have put up Star Trek comics web sites.
Please excuse any stale links.

Guide to the Gold Key Star Trek comics
http://curtdanhauser.com/Enter.html
Curt Danhauser has created several well-designed and entertaining
web sites on a variety of Star Trek topics. This is the best of
the online Star Trek comics guides.

Star Trek Story Records
http://www.danhausertrek.com/Records/Enter.html
Comprehensive web site on the Star Trek story records by Curt
Danhauser.

Guide to Animated Star Trek
http://www.danhausertrek.com/AnimatedSeries/Main.html
Not really about comics but this is another interesting site
by Curt Danhauser.

Star Trek Gold Key Comics Archive
http://members.cox.net/goldkeystartrek/startrek.htm
Cover art can be easily downloaded from this site.

The Star Trek Comics List
http://www.zip.com.au/~aaroney/StarTrekComics.html
Guide to recent Marvel and Wildstorm Star Trek comics. This site
seems to be missing in action.

Star Trek Annual Gallery
http://www.tonystrading.co.uk/galleries/annuals/startrek.htm
http://www.tonystrading.co.uk/galleries/annuals/tv21.htm
Cover art from Star Trek annuals published in the UK.

Star Trek Comics by Marvel (1980-1982)
http://www.coolcollecting.com/features/articles/artcl035.html
Includes description and ratings.

The Star Trek Annotated Timeline
http://www.pjfarmer.com/woldnewton/Startrek.htm
By Win Scott Eckert; includes events from Star Trek comics.

ComicsPriceGuide.com
http://www.comicspriceguide.com/qsearch.asp?findme=star+trek
Star Trek comics price guide.

Star Trek Books Database
http://www.psiphi.org/cgi/upc-db/
Includes recent comics and graphic novels.

The Complete Starfleet Library: Comic Reprints and Graphic Novels
http://www.well.com/user/sjroby/lcars/comicindex.html
Index of comics in book format.

STasis: Your Guide to the Scholarly Literature of TREK
http://www.ircruise.com/stasis/stasis.htm
Hasn't been updated in several years. Has a few citations of
comics-related articles.

Trek Nation Comics Site
http://www.treknation.com/comics/index.shtml
Information on and reviews of Wildstorm Star Trek comics.

Grand Comic-Book Database
http://www.comics.org
http://www.comics.org/search.lasso?type=title&query=star+trek&sort=alpha&Submit=Search
Internet database of published comics.

Comic Book Database
http://www.cbdb.com
Internet database of published comics.

ComicsDB
http://comicsdb.webhop.net
Web comic book database and free collection tracking if
you register for an account.

comics research bibliography
http://www.rpi.edu/~bulloj/comxbib.html
Citations of comics-related articles and publications.

Doug Gilford's Mad Cover Site
http://www.collectmad.com/madcoversite/
Includes Mad Magazine Star Trek covers.

Artwork from Keith R.A. DeCandido's Star Trek Comic Book Work
http://www.sff.net/people/krad/trekcom.htm
Downloadable images.

Details about Andy Mangels' and Michael Martin's Star Trek comics
http://www.andymangels.com/stcomics.html
Includes cover art.

Cover gallery from David Mack's web site
http://www.infinitydog.com/coversindex.html
Includes cover art from the Star Trek comics he has written.

Writer/artist Ken Pender's comics web site
http://www.kenpenders.com/
Includes cover and interior art in color and b&w

Star Trek/X-Men
http://members.tripod.com/originalvigilante/startrekxmen.htm
Review of the Star Trek/X-Men crossover.

Graphic novel and trade paperback reviews
http://www.geocities.com/SoHo/Study/4273/startrek1.html
By the Masked Bookwyrm

Get Critical: Star Trek books and comics
http://www.littlereview.com/getcritical/allbook.htm
Reviews by Michelle Erica Green

Marvel and Malibu comics collector site
http://www.big-tel.com/
Information and cover images for Malibu Star Trek promo and variant comics

Index of Klingon appearances in Star Trek comics
http://www.geocities.com/grethor_detlholqu/

Google Web Directory
http://directory.google.com/Top/Arts/Literature/Genres/Science_Fiction/Series/Star_Trek/
Google's Star Trek resources listing.

Previews: The Comic Shop's Catalog
http://previews.diamondcomics.com/
Monthly solicitation of forthcoming comics, available online and at your
local comic shop.

Mile High Comics: Star Trek comics for sale
http://www.milehighcomics.com/trek/

Strange New Worlds
http://www.strangenewworlds.com/trek/index.html
Several articles on Star Trek comics.

Interview with Star Trek and Star Wars comics creators
http://www.popthought.com/display_column.asp?DAID=195
By Alex Ness

Author Glenn Greenberg Remembers Untold Voyages
http://www.trekweb.com/stories.php?aid=40bbf4b15f817
Interview by Gustavo Leao

Memory Alpha
http://www.memory-alpha.org/en/index.php/Main_Page
http://www.memory-alpha.org/en/index.php/Comics
Wiki encyclopedia of Star Trek information in progress.

The Periodic Table of Comic Books
http://www.uky.edu/Projects/Chemcomics/
http://www.uky.edu/Projects/Chemcomics/html/yttrium.html
The entry for Yttrium features a Star Trek comic.