http://www.bargaineering.com/articles/2011-roth-ira-conversion-rules.html
In 2010, the income limit for Roth IRA conversions famously disappeared. Many people, who had been forced to get a traditional IRA because of higher income could convert that traditional IRA to a Roth version. It is still possible, in 2011, to convert your traditional IRA to a Roth IRA. Additionally, you are still able to rollover a 401k into a Roth IRA without the intervening step of rolling your 401k into a traditional IRA, and then converting the traditional IRA to a Roth. However, there is a key difference: You can’t spread out the tax payments associated with your Roth IRA conversion. Before you decide whether a conversion to a Roth IRA is a good idea, consider the tax implications, and how you might be affected by making the move.