In addition to http://galactictradefederation.com/, Zion's created a fantastic comparison webpage: http://aptirrelevance.com/otscreenshots/screenshots.php?shot=1 which is very slick. Then after those two sources, Rikter's FanDVD.doc is the place to find out about new releases.
Then if your looking to expand beyond SW Transfers, there's http://noneinc.com/Archive/FlimsiplastDatabase/fd_main.html which is a start to collect a list of SW media in any form. It came about because of a thread to collect all the SW Documentaries: http://www.originaltrilogy.com/forum/messageview.cfm?catid=9&threadid=2506
anyway head over the OT.com IRC channel and talk about what's working and what's not.
Also, Jay has recently started a thread to discuss housing this type of information in the OT.com, head over to that thread:
http://originaltrilogy.com/forum/messageview.cfm?catid=9&threadid=4819
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