If you want a small, streamlined notebook that runs OS X, but don't want to pay MacBook Air prices, here's my guide on how to do this on a £200ish Dell Mini 10v:
How to haϲkintosh a Dell to run Apple - a Dapple!
The guide is a bit old as it was for OS 10.6 and we're now on 10.8 - so YMMV, but updated drivers are available on the web for the latest notebooks and for Mountain Lion.
To see what's compatible, check the compatibility chart. The reason I chose a Dell mini 10v is that it is the most compatible and drivers exist to allow everything to run smoothly and natively...
