Sign up / Sign in Redirect Rule?
Using Jamroom
its possible, but I haven't done it.
The function:
will save a cookie to the users browser that tells the system where to go after successful login.
The problem is where to call that function. If you call it in the templates, you run into the issue of caching. Even if you get passed that you need to setup some rules to decide which pages NOT to call it on, like the login page.
So yes its doable with a bit of fiddling and a module, but it doesn't exist as a setting to turn on/off right now.
The other option I can think of would be to put your login form in a lightbox that pops open. They login and on successful login the lightbox closes and the current page refreshes, so they are logging in and being redirected but that window is quickly closed.