Without finding out from him, I wouldn't come to that conclusion at all, I know many people with cameras that are asking me how to attach them to a telescope. That doesn't mean they are looking at buying one...
Will await to see what he says.... But yes with the inclusion of the 400D and 40D into Canon's line up of cameras, the 350D is a cheaper option if you are looking for a good cheap DSLR for Astrophotography.
