[Update] You can now see the most up-to-date 401K/403b, IRA and Roth IRA limits here
The IRS has released the latest 401k, 403b, IRA and other retirement/thrift plan contribution and income limits. With COLA remaining unchanged again this year, 2011 plan limits have also remained largely unchanged for the third year in a row. Income thresholds have marginally increased over last year.
Here is a summary of the main changes with links to more detailed articles: