SLR or CCD

[EA2007]

For the past year I have had an interest in astro-imaging.....

So I bought myself an Olympus E-400 thinking that if I attach it to my goto scope it will be alright. However it turns out that the Olympus range of SLR's do not expose for a long amount of time. So, I thought, well I'll sell it and get a Canon SLR. But now it comes to it I am figuring that it may be easier to purchase a CCD or webcam to do the job for me.

If anyone could help me out with telling me what is

a) a good ccd/webcam to take long exposure images

what accessories I need to connect it to a NexStar4SE and laptop

c) anything else worth knowing

and possibly

d) anyone interested in an Olympus SLR + cable release + XD card + case + t-ring (worth £100-ish!) and t-adapter

Thanks