New Rules for Converting to a Roth 401

... year you make the conversion. But you can withdraw Roth 401(k) money tax-free in retirement, as you would with a Roth IRA. Although rollovers are permitted, not all employers offer the option yet. Only about 34% of the 401(k) plans administered by ...

http://www.kiplinger.com/article/retirement/T001-C001-S001-converting-to-a-roth-401-k.html