I got icq 10 working, was able to login after much hassle. BUT, seriously I don't like it, far from.
I already moved back to trillian which came with a nice surprise for me, the 6.0 BETA with a new UI and minimalistic design.
Don't like ICQ 10, try trillian folks it's trilltastic. Plus I love the new design...
www.trillian.im/get/windows/6.0/