Depends how politically driven Fitz and the team are. With the '08 election already started, I'd not bet against it. Too much milk from that cow.
His employer, DoJ would have to approve, but won't go for it, after the obvious fishing sham that he had pulled.
Media has been on trial already, they didn't like the taste of it one bit after Armitage story came out, and some of them narrowly escaped the hot seat only due to judge's rulings, they have absolutely no appetite for more... They have enough material here so they simply can recycle the same WH-OVP "conspiracy" story that Hollywood is producing for them just in time for '08.
Fitz would need something else to ask for retrial - new "evidence", evidence he feels he was not able to present due to judge's rulings, or evidence of jury prejudice ... he has nothing of the kind, if anything he got all the favors and preference and defense got almost nothing - there is no reason he can give for granting him a new trial.
Fitzfauxng did his hatchet job and maybe rewarded later by Democrats in power, but he was unmasked as a political hack with a law degree, and in that sense his case and he are done, over, finito...