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Don't waste your time on tricks like this. Better spend your energy thinking about how to build a useful, interesting site that people actually want to visit and link to.
You're also wasting your time thinking about keyword stuffing density or whatever you want to call it. I think you've been reading in a bad neighborhood. ;)
Spend some time reading the forums here. Here's a good post to start with....
Successful Site in 12 Months with Google Alone
[webmasterworld.com...]