I'm afraid the latest news out of N.O. is not positive w.r.t. the restaurant scene.
The latest estimate that I have heard (regarding the Uptown / Garden District area where my condo is located, and also such notable restaurants as Commander's Palace, Brigtsen's, Clancy's, Upperline, Pascal's Manale, Dante's Kitchen, and many more) is that while power may be restored relatively soon - as soon as this weekend for some areas, they are still two months away from having potable drinking water.
While most of these places could get by with bottled water for drinking, without safe water for washing dishes, etc. they will not be able to re-open.
For those interested, Entergy's web site
(LINK) has a list (updated daily, by zip code) of estimates as to when power will be restored. Safe water is another issue entirely.
All this, of course, assumes no major additional damage from Rita.
I exist in Chicago, but I live in New Orleans.