Stolen PC Tracking Software

Hi Folks,

I am just checking out a few software titles that can track down my stolen PC's. I am checking out:
Prey - http://preyproject.com/ ( Windows )
LoJack - http://www.absolute.com/en/lojackforlaptops/home.aspx ( Windows )
Hidden - http://hiddenapp.com/ ( Apple Mac only )

I noticed that Prey has the TechRepublic logo attached on its site, so I thought I would start here and see what TR itself has to say about Prey and any other software that it or the users of TR may know. Prey also has two versions, one free and the other paid for.

I am open to any software. I have 3 laptops personally so am interested in multiple devices under the one banner.

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