You can't get a Pentium processor in an iBook. Pentiums run on the x86 architecture, where as Apples use PowerPC, thus your Powerbook would be a g3/g4. After some quick checking on E-Bay I've found...

As an avid Mac user, I'm repulsed by his theft of Mac's ideas and the Windows system in general. I wouldn't go so far to call him evil, he's done a lot of good things with his money.

A wee bit vague, don't ya think? You'll need a C compiler, a good guide, and a few bucks. Do a google search or buy a book, they're the best way to get started.

As an avid mac user and Steve Job's cult member, I'm going with the iMac G5. I know people just like you who were tottering between the Mac and PC and they wet themselves with joy after purchasing...