nice. i can see myself using this for django projects (a bubble for the urls.py, another for the view and another for the template)
Not that this is a bad thing, though. People seem really afraid of having the code they just wrote be executed, but I think this is an unfounded fear. And, as SLIME shows, you get great information from running the code; much better than mere static analysis.
Personally, I have all the pieces together for doing this with Perl, but I have not put it together into anything coherent because it's largely useless. An occasionally-updated tags table is really all I need, so I can't get motivated to make "Eclipse for Perl".
Maybe someone else that sees the value in these tools will do it. Let me know what information you're interested in, and I will show you how to implement it.
It seems like what would be hard is dot-oriented method invocation ala python and ruby. There's been some work at figuring that out using static code analysis, but it's a lot less ready.