FYI, there's finally a stable 7.1 release, so no need to go nightlies for an up-to-date ROM. The only reason we were recommending nightlies over stable releases was because there had been such a long gap (6 months!) since the last stable release. Now that they finally got out the first 7.1 stable, I wouldn't be surprised to see a return to stable releases every few weeks.
Of course, CM8/9 nightlies (Android 4.0, Ice Cream Sandwich) may be less than a month away, by one of the main NC devs' estimation