An out of the ordinary request

[ilanle]

Hi,

I would like to make an unusual request.
I started with playing with the LDA on top of Wikipedia articles (or actually excerpts form Wikipedia articles).

I find that on the one hand, results are very sensitive to the choice of parameters (# topics, # top terms per topic,# iterations,# of documents and size of each document) and on the other hand, each run takes a very long time, so self-learning is very slow.
I would very much like to have some guidelines/logic/intuition/huristics to the choice of parameters.

What do you think a good medium would be to do that?
Thanks
Ilan