Here are some domains which are expiring and will become available for registration in the next few days. You can use most registrars to register an available domain, but the first 2 domains in this list are exclusive to one of the domain catching services

wholetruth.com has PR6 (on NameJet)
secretgeek.com has 206 backlinks according to Google (on NameJet)
mousedream.com has 3,714 backlinks according to Yahoo
loan-account.com has 306 backlinks according to Alexa
cao8.org has an Alexa Traffic Rank of 102,153


Here are some domains which have expired and were available for registration when checked earlier today. If they are still available, you can register them through most registrars

insungyoga.com has an Alexa Traffic Rank of 2,718,783
chuckbriger.com has 8,132 backlinks according to Yahoo
movingshadow.net is in the Yahoo Directory
ironheadmarcs.com has 306 backlinks according to Google

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http://www.domdat.com for expired domains