EGroups, Geocities, Rocketmail...
Flickr noooo!!! You were so open, and so free :(
del.icio.us noooo!!! You were quasi-useful :(
i used to use rocketmail back in the day... but my account disappeared when yahoo took it over :(
I used to have a free Geocities email account - it got worse when Yahoo took over (no more forwarding) and later on they killed all free Geocities accounts.
Yeah, this sucks... I deleted my del.ico.us account and moved to Simpy, it's not as good, but should work.
Never really cared about Flickr, though.
They've also eaten up Upcoming.org which was really cool... at least they didn't butcher it or del.icio.us yet.
I forgot one-- they ate Launch.com, rebranded it, and never upgraded it to support Fx or OSX.