Tim the camera you will want is the Philips Toucam Pro, cost about £50.
The adaptor to fit is available from Stephen moggs of Australia //www.webcaddy.com.au/astro/adapter.htm and costs $20 US.
The software I would advise is CCDTOOLS from //www.pk3.org/K3CCDTools/ it is freeware
Telescope House are doing there own version of the Moggs Adaptor right now - I dont know how much it is though
Yep thanks Mike, I forgot to mention, Telescope house are selling theirs for £24/25.