Lightweight tent recommendations?

Do you even Paris, Berlin, Amsterdam, Copenhagen, Milan, etc ?
These places seem to have massive bike-theft problems, as bad as London.

Anecdotal evidence 2: On a recent trip to the US of America I borrowed my friends bike and locked it up good. The thieves broke the lock and made off with the bike within 45 minutes.

Theft will always be a problem but it would be interesting to see what you guys think of these ? http://igg.me/at/bikehawk

GPS tracker solution with iOS, Android and Web app. Granted a tracker can't stop a theft but it can make it a lot more likely you get your bike back.

PS full disclosure I am the founder of Bike Hawk !! So I'm biased, but would be cool to see what the lfgss community thinks.