Canon Macro Lenses. What are you using?

[msjboy]

I have a Canon 40D ( bought new several years ago) but have not used it much because it is simply too big so invested in a poormans macro tube for just a $10 (http://dx.com/p/macro-extension-tube...-cameras-12456) .. not sure how to use it but it requires me to get very close to the object first ... will post in the future some picts once I get it going.
Anyone else use this before on their SLRs???

regs
msjboy