many people start with Kenneth Davids home coffee roasting book - but Sweet Marias is a great (US) site with good info, reviews etc.
as a really good economical commercially available home roaster you could do much worse than the behmor from coffeesnobs *beanbay in the other stuff section, its quiet, easy and *flexible as to roast size and produces really good roasts, pick up some good quality green beans while youre there!
i got one for my dad (from another vendor *:() and he loves it, (so do i) it compares very favourably with the roaster i use which has a smaller and less flexible charge weight. (and is three times the price)
the CS member package that Andy offers is Excellent value (when i got the spare cash im coming Andy!)
genecafe (noisier but with great visibility of beans during roast) and the Hottop *(which is well built has, has good visibility of beans, is quiet with a reasonably quick cooling cycle (important) but requires regular replacement *filters), are others that are generally locally available (through a few site sponsors - Pullman espresso accessories among others)
really its horses for courses, the best thing to do is jump in and start roasting i reckon, youll be glad you did!