Yes, Unity is god damned amazing. And also expensive. I just bought the $250 Indie version a little while ago. So if you can beat the price (and that fact that you can't make Windows .exe files without the $1,500 pro version), buy it! The community over there (forum.unity3d.com) are very helpful with anything.
And Soapy, yes Unity will be able to publish to Wii soon, but not without a Wii Dev Kit. >_<
Oh, and buy it quick, because Unity 2.0 is coming out this summer at a higher price, but if you buy 1.6.2 now you'll get a free upgrade to 2.0 later on!
EDIT: You actually must be lying about one thing or another. If you got a MacBook, it has to have an Intel Processor. If you don't have an Intel Processor, you don't have a MacBook. So if your computer is truly a MacBook, try downloading and installing Boot Camp and a copy on WinXP (down with Vista!). But still get Unity too! It'd be cool to have another ZFGC'er at the Unity Community.