Someone asked me to post a review of Xena dic lock/alarm thingy (http://street-bikes.ridegear.com/cgi-bi ... ?E+scstore). Well, I got it, and already used it couple times. Here are my impressions:
It is what it is: disc lock with alarm. It goes on the front wheel brake disk and prevents the wheel from turning (doesn't fit on the rear wheel), and also starts beeping if you disturb it in any way. The shock sensor is actually too sensitive: I triggered it every time I tried to take the lock off. And of course as soon as it starts beeping you yank at the lock trying to remove it faster, which inevitably takes longer, so the people all around start turning their heads in your direction, so you're sitting there saying "That's ok guys. My bike. Never mind."
When you put it on, it makes a single beep to let you know that the batteries are still good. (Interestingly, it does not make the beep if you lock it without attaching it to the wheel, so it must sense that somehow). It takes *six* lithium batteries (the button type). The replacement battery pack is included. You need allen key to get in there (also included). And it also comes with a carrying pouch which you can attach to your belt with the belt strap.
Obviously it does not lock your bike to any unmovable object, but I don't need that at home or at work, and I can't carry a heavy chain with me when I go out, so this is about the best security I can get. And for $92.29, including taxes and shipping, this is a pretty good invetment.
Thanks ninj! I'll hafta tell you about the guy I caught stealing my car a month ago next time! 
JACKED!