youtube (though i think i got an account just for some added functionality; i don't upload anything)
imageshack (don't use this anymore)
flickr (i use this for the communities mainly, i just have the free account which limits you to 200 photos)
zenfolio (my image host server)
godaddy (my web server host)
i have an mtbr account but haven't posted there (or even lurked) in a great while.
About a half dozen misc drum and music forums
Myspace - almost a legal requirement if you're in a band
flickr - go here: http://www.flickr.com/groups/ridemonkey/
Lunar Pages for web hosting (cheap AND reliable)
Go Daddy for domain hosting
Gmail for mail backup
I just peeked at my password manager. I currently have 45 user names/passwords, if you're not including shopping websites like Amazon . The accumulation of however-many years of browsing. Random questions on random forums, websites that require an account before viewing content...
All my usernames and passwords are the same except for the two accounts that contain private financial data. That is right, if one of you mods can figure out my RM password you can hack into my local mtb forum too.