Many IM networks in one client

For those of us who login to a bazillion IM systems (okay, 6 or so for me), WengoPhone is pretty nice. Unlike Pidgin (prev. Gaim) or Adium, WengoPhone does SIP without crashing on my machine. So I can log in to my SIP, AIM, ICQ, MSN, Yahoo! and Jabber/Google Talk accounts all with one IM program. Which is nice, since I still have to login to Skype for work, and I'd like to keep the number of programs/windows I run to a minimum.