I've been reviewing issue tracking software, but I'm not finding anything I'd consider particularly user-friendly. And by "user" I mean end-user/client, not me.

I volunteered to do the website for the church where my wife works. I know there's going to be a variety of requests and feedback as we go along, and I'd rather not try to track it all via email. I'd prefer to have them enter their requests (bug, feature, to-do, support) into a web site where I can manage them all.

Everything I look at requires too much knowledge on the part of the client. Even ticketing systems seem to expect a technical audience, and they don't have the issue management support that I want as a developer.

BugZilla is way overkill. Mantis and Eventum look promising for other projects I'm doing, but are too technical for this. Drupal Project* looked promising, but turns out to not only be too technical, but too specific to Drupal itself.

I strongly prefer PHP/MySQL solutions, although Python, Ruby, and Postgres are also supported by my hosting service. Open Source is pretty much a requirement, my budget is $0 (which eliminates things like BaseCamp).

Any suggestions?