I’ve found decent unified IM clients on both Mac and Windows – this is a huge and pleasant surprise for me. Over the last few years I’ve tried various programs that claim to work with all of the chat protocols (Yahoo, AIM, MSN, IRC, etc.) but they all sucked badly (Trillian). Finding a program on each platform that doesn’t suck makes me happy. I tried to donate, but I couldn’t find a donation box on either page… I’ll try harder at some point.