I notice that daniweb does not have a forum for logical circuitry :(. Does anybody know a good site that does? Is it possible for logical circuitry to be added to daniweb? I often like to design custom circuits from transistor or gate level and up, and I have never found a decent forum on which to post questions.

Try posting in the Hardware & Software category with appropriate tags. That's the "wave of the future" as far as forums and categories go.

Or try the Computer Science forum :)