[xtag-meeting]: Question supertagging

Hi everyone,
Three quick questions from Pierre Boullier :

-Apart from Srini's, are there any other supertaggers implemented ?
-If so, does anyone have a reference or know someone we could ask ?
-Has there been any attempt to do rule-based supertagging ?

To the best of my knowledge, the answer is "no" for the 3 questions, but I wanted
to double-check with you.