Trying to move taxable income from 2011 to 2010?

No. If you had anticipated 2011 income that you could have moved up BEFORE the end of 2010, that would be a possibility. Too late now.

There is no such thing as a "Roth to Traditional IRA transfer".

In theory, if you contributed to a traditional IRA for 2010, and deducted that contribution, you could "recharacterize" that contribution as a Roth contribution, so that you lose the deduction have the same amount of 2010 income as if you did not make the contribution. This would reduce your income in the future year when you took a distribution from the retirement account.

You should have told whomever was paying you to delay until after Jan 1, 2011. If the income was constructively received in 2010, that's the end of it. You can't un-ring the bell now.

You cannot change accounting methods without the consent of the Commissioner of Internal Revenue, nor would doing so be retro-active to any date prior to the date that the Commissioner approved the change.

how much could the foreign tax credit be? any I have ever seen are so small it makes very little difference

and no, if you have income reported in any specific year, it is reportable in that year only

Change from cash to accrual