around 200 contacts, and 20-50 online everyday. In Romania, the Y!Massinger is the most used, so I use it to talk with my m8, teachers etc It's a really reliable tool for me, and sometimes my friend argue with me when I don't show up on massinger at a given time.
altogether on my MSN/Yahoo i have over 1,200,000 Contacts My List just gets bigger and bigger everyday
Earlier Yahoo! had a limit of 300 I believe after their Version 7 was out, It was increased but I ain't sure how much. I used to delete contact to add new before 7 version came. Now have around roughly around 500+ for sure ! Cheers!