Go over on the PCT-L–it is reported there (by an email from an SIBBG meeting attendee) that the SIBBG voted October 24 to rescind conditional approval of the Ursack, so that’s no longer an option in the restricted areas.
http://mailman.backcountry.net/pipermail/pct-l/2007-December/011407.html
Unfortunately this ruling may put Ursack out of business. Too bad, because the Ursack is an extremely useful item outside of the Sierra! Evidently Sierra bears are too well conditioned that bag = pinata and keep after the thing until they manage to breach it. I’d get one anyway ) to use elsewhere (it keeps out rodents as well as bears less conditioned than those in the Sierra) and rent a canister for the Sierra. There are a number of canister rental programs.
grannyhiker