The main reason I don't run linux on desktop:
cuteftp
dreamweaver - html coding
photoshop
paint shop pro
winamp
ahead nero burning rom - dvd/cd rw software
iRiver manager - for mp3 player
winrar/winace - archiver (zip, tar, rar, ace, arj, lzh)
trillian - im (icq, msn)
wincvs
borland...