Actually I think roundup search works very well, except for the case sensitivity on username searches.  The UI could use some help, but personally I won't be satisified with it until I get around to writing a command line interface for it :)  But that is off topic.

In our tracker, an untriaged issue has stage 'no selection'.

We can already label an issue with multiple components.

Having a way for non-commiters to indicate to everyone (but especially triagers) that they are interested in helping with a given module would be a nice feature.  Someone has to figure out how to implement it though, and I think any movement on this issue is going to have to start with a concrete UI design.