A. We have introduced the Roth IRA conversion tactic several times in our blogs, see here.
Although you can do your Roth IRA conversion at any time, timing of the conversion matters. When you do the conversion, you will have to pay income tax upfront, what you are hoping is the future appreciation and the resulting tax savings will be more than offset the current tax pain.
MarketWatch has a good article explains why it advocated Roth IRA conversion 2 years ago, but advised against it right now. Worth reading it if you are thinking about the Roth Conversion at end of 2014.