I think NKA is the most likely MLP to cut their distribution, and even then I think it may be next quarter rather than this one. Their 2012 dcf shortfall is likely to by much worse than NRGY's.
As for NRGY, I think they will be reluctant to cut the distribution unless the situation is really dire. If coverage is in the 90% range, I'd think they would rather keep the distribution at the same level and wait for things to improve. Despite what one other poster said, when MLPs cut the distribution it is perceived negatively by the market and the unit price takes a haircut. Some other MLPs have gone with coverage less than 1 for a while (CPNO, for example).