I've seen one floating around TLS, but can't recall where. We have categorized many LSATs, so let me see if we can get that into a format that would be useful. Our LSAT trackers, which you can find in our training center --
http://www.atlaslsat.com/training-center.cfm -- can help you analyze your work on tests June 2007, 45 - 50, 58 & 59. We're working on including others.
Finally, here's a general breakdown of LR questions for you, and as you can see, the question types are pretty well evenly represented.
Analyze the argument - 15%
Assumptions - 16%
ID a flaw - 16%
Inference - 13%
Strengthen/Weaken - 16%
Application - 18%
While during our course and in the books we go into sub-categories on some of these, we're definitely not into teaching lots and lots of categories, as the work you do with many of these question types is almost identical.
I hope that's helpful. Tell me if you have any questions about the above.