I went through LJ spotlight and made a huuuuuge list of comms to join XP
Ready?

todayirealized -JOINED
note_to_cat -JOINED
cooking_club -JOINED
foundphotos -JOINED
color_theory -JOINED
runaway_tales -JOINED
yoga -JOINED
mission101_2010 -JOINED
notemeetsletter -JOINED
adayinmylife -JOINED
baby_names -JOINED
selfportraits -JOINED
bentolunch -JOINED
zombie_survival -PENDING
cutshort -JOINED
girl_gamers -JOINED

EDIT: Deleted all the inactive ones, joined most.