Is this correct?

You can contribute to both a 401k and a Roth IRA.
The Roth is limited to $2000.
The 401k doesn't have this limit.
You can rollover your 401k into a traditional IRA
You can rollover your traditional IRA into a Roth.

If this is true then would'nt I be able to contribute more than this $2000 limit by simply rolling over from 401k to traditional, then to Roth once a year??

What am I missing here, are you limited to the amount of times you can rollover? is there a time span that must occur between rollovers? I must be missing something. Thanks.....