I agree that Anki would be a very welcome addition to the repository.
I personally have used a few different SRS's and have really come to love Anki over time - I now prefer it to Mnemosyne - but it is probably just personal preference.

I did have a quick go at downloading and running the source. It was a random choice late one night, so I didn't follow it through too well. Basically I think we also need to install some pyqt4 bindings, and possibly some other packages before it'll do much.

I would have another look, but unfortunately I've packaged the N900 up for it's trip to the carrousel - err.. I mean to get repaired. I'm also very much a beginner when it comes to Linux development and Python, so I might be talking rubbish.