Okay, I know the jury is still out on this one but anyone wanting to check out the 4th edition D&D (or DnD) rules must take the opportunity to download the quick start rules and companion module which Wizards of the Coast are now giving away (grr, I had to buy mine but at least I get to save on ink and have some really nice floor plans...)
http://www.wizards.com/default.asp?x=dnd/4dnd/dndtestdrive(The character builder software didn't work for me and it spent a long time trying to update itself so I'd avoid that if I were you.)
direct links:
http://www.wizards.com/dnd/files/QuickStartRules.pdfhttp://www.wizards.com/dnd/files/H1.pdf