[chucker]

Originally Posted by thegelding how to search for emi or drm-free at the iTMS?

I don't believe this is currently possible.

Somewhat related, though, you can search your local library or EMI songs, thanks to Spotlight.

if the drm-free songs are even on the iTMS yet?

Not until May:

[..] from the iTunes® Store (www.itunes.com) worldwide in May.

how we can get apple to broaden the search for drm-free at their site?

By using the iTunes Feedback form or the Radar bug tracker.