A decision like this is exceptionally complicated. It's important to consult your investment advisor if you believe converting your traditional IRA to a Roth IRA may make sense. Also, as with any decisions that involve taxes, you should consult a tax planner to find out what issues may impact you the most specifically.
In closing here are some additional resources on Roth IRA conversions.
Don't Rush Into Roth IRA Conversions-- My MoneyWatch colleague Charlie Farrell wrote an excellent article detailing why conversions are not a slam dunk for everyone.
Roth on Roth IRAs and 401(k)s-- Another MoneyWatch colleague, Allan Roth, discusses some of the differences between traditional and Roth IRAs.
The Rockin' Tax-Free Roth -- Paulette Miniter discusses some of the advantages of investing in a Roth IRA.
Follow the series: Roth IRA Conversions