The Honeynet project (sponsoring 9 projects in Google's Summer of Code this year) has a really great LiveCD called Roo, that creates an immediate trap of magnificent proportions:
https://projects.honeynet.org/honeywall/attachment/wiki/WikiStart/roo-1.4.hw-20090425114542.iso

Roo, like Knoppix Tools on a USB key, is one of those must have items for everyone.  Be careful however of the legal implications, which include liability (you built it insecure, knowingly - what is someone uses it as a jumping off place?), complicity, entrapment and more.  If you are game, it's exceedingly fun; rather like a Cracker SimCity?

Honeynet reverse engineers also built a very amusing "Eye Chart" for determining immediate infection with the worm:  http://www.confickerworkinggroup.org/infection_test/cfeyechart.html

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