Sharewear is pretty lame. Like LimeWire Pro and Basic: Slower download speed and a message to upgrade at startup. Trillian Pro and Basic are like that too.
Gaim does MSN, AIM, IRC, IRQ, Yahoo, and a few more that I can't remember off the top of my head. They all show up as one buddy list, it's cool.
The Mighty Mouse is Windows and Linux compatible, but it's really annoying to use. The only cool thing it has is the track ball for scrolling 360 degrees.
I have to admit.... I find the mac commercials helarious.... Seriously.... just the Bill Gates look-a-like has me practically rolling around on the floor laughing...
my last and only Mac was an Apple IIe.... man, that was a POS back when friends had 333Mhz Pentiums....