This is requested _a lot_. It's scheduled to be added when we do the major syntax-system change, but *maybe* this one will be done before, seeing how frequently it comes up as a request.
Just a me too: I'd love to see it sooner rather than later. :) It's the one thing that I use regularly in Xcode that I can't add through TextMate's customization features.
Another me too - but do it better! Provide a hot key to access (switch focus to) the pull down menu and then make it navigable with up and down arrows. The let the user tab to select the highlighted function and switch focus back to the main document with the insertion point at the function selected.