i guess no one uses macs
You weren't being very patient. Anyways, Macs come with most programs you already need. You should consider the following, though:
*For chat:
AdiumX - Completely free, and supports instant messaging on any messenger (AIM, ICQ, MSN, Yahoo, Jabber, etc etc)
*Office: Either purchase
Office:Mac (you'll get a free coupon for Office 2008 if you buy Office 2004), or consider downloading
NeoOffice, a free alternative.
*Alternative Browser: OS X comes with Safari, some people prefer
Firefox for its add ons, however.
*Download
Perian for OS X, its a plugin for quicktime to play many media files. Also get
Flip4Mac Windows Media Components, and
VLC (to play just about any video/audio file out there). They're all free.
*
Transmission for BitTorrent
Enjoy your new Mac.
Steve