I'm a bit of a newbie in this game, but I've decided to try some planetary imaging using a Philips SPC900NC. They are available very cheaply from Canada or USA on ebay along with the adaptors. I've ordered a camera from Toronto for US$65 (incl. $30 shipping) and an adaptor in Delrin from South Carolina for US$21 (incl. $3 postage). At the current exchange rate this is half the cost from my usual supplier in Australia.
I'd be happy to provide the supplier details if anyone wants to check them out.
Update: The Webcam and adaptor both arrived within 10 days of ordering, which is pretty darned impressive
. Both were in excellent condition and are working well. Now I'm figuring out how to drive the various capture programs on offer and waiting for some decent weather.