Abbreviations for discussing the various titles are hardly standardized, 
but if you need some the following are all serviceable and properly 
behaved, well-suited to be inserted into any needful post:

              AF  = Alpha Flight
           Cable  = Cable
              DP  = Deadpool
           Excal  = Excalibur
            GenX  = Generation X
            MutX  = Mutant X
              NM  = New Mutants
       Unlim/XMU  = X-Men Unlimited
             UXM  = Uncanny X-Men
     Wolv/Wolvie  = Wolverine
            XFac  = X-Factor
            XFor  = X-Force
     X-Men/Unadj  = X-Men

In general, the main confusion comes between Uncanny X-Men and X-Men, 
mainly because up until a few years ago, Uncanny was just called "X-Men," 
there being no actual title called "X-Men" to confuse it with. If you're 
talking about Uncanny, use it consistently and clearly in your post--the 
other possibility is calling X-Men "unadjectived X-Men," but nobody really 
wants to write "unadjectived," so give yourself a break and call Uncanny 
Uncanny (or UXM), and X-Men just X-Men. You'll get used to it as you go 
along.

Another thing to remember is that xbooks is a newsgroup, while the X-books
are the comics. To help prevent confusion, this FAQ recommends calling the 
comics X-titles, or to put the dash "-" in X-books when talking about the 
comics as opposed to the newsgroup. You may also call the newsgroup racmx
(pronounced "rack-em-ex).