A nice overview of how to use the @font-face code:
http://nicewebtype.com/notes/2009/10/30/how-to-use-css-font-face/
Free and cheap type foundaries:
http://www.youthedesigner.com/2010/04/06/free-web-2-0-fonts/
Subscription:
http://webfonts.fonts.com/ (you can sign up for a free account with access to about 2,000 fonts, limit to 25K views per month and you have to show their badge –ad on your page.)
http://typekit.com/ (I love their fonts, but don’t know anything about their webfont service)