The Monday (May 23) deal just went up on woot.com: Kindle (2nd generation) for $89.99 (+ $5 shipping). These are refurbished units, but come with a 1 year warranty from Amazon.
Standard Woot rules apply: this single-day deal is effective until midnight Central time on Monday night or until all the units in stock are sold, whichever comes first.
Even if you're not in the market, you should have a look at the write-up (at
http://www.woot.com/sale/19381). The Woot salesmanship, as always, is breathtaking.