Rough idle, strange shifting - MAF sensor?

[TheEdgeofSanity]

Hey guys,

I'm having trouble where my car is idling very rough almost as if it is misfiring once it is heated up. Sometimes when I idle for a long time, my engine starts loping and chugging. I also have an issue where my trans goes in and out of lockup during light acceleration under load (hills, passing) when it is in 3rd or 4th gear. I found a GM TSB that points to the MAF sensor and I was wondering if anyone has ever heard of this?

I've replaced my plugs and wires in the last 1000 miles. Also, its worth noting that the engine runs smoothly when not idling and my fuel economy is still in the high 20's.