Here are some papers/resources for more background on UCT:
1. If you are interested in an hour-and-a-half tutorial on montecarlo planning (with UCT thrown in), consider this ICAPS 2010 tutorial from Alan Fern
http://videolectures.net/icaps2010_fern_mcpbprp/
(The slides on UCT I used are courtesy his tutorial)
2. If you want details on a UCT-based planner that did well in ICAPS planning competition, see PROST
http://prost.informatik.uni-freiburg.de/ (they have a paper link too)
3. The UCT-LRTDP comparison paper I showed in the class today is available at
http://homes.cs.washington.edu/~akolobov/papers/Gourmand.pdf
If you have any comments on these or anythings discussed in the class today, feel free to post.
Rao