AAdvantage Status: None at time of flight, now PLT
Fare class: L
What happened: Flight to LGA left gate on time, but after we got de-iced, the pilot announced that our plane would be taken out of service due to a mechanical issue. We returned to the gate, and thankfully they found another plane for us, so we boarded our new plane about 30 min later. De-icing took about an hour as we cycled through 3 de-icing trucks due to equipment failures on the trucks. Flight arrived 2 hours late. My connecting flight already left LGA before we landed.
Compensation: 10,000 miles
Comments: I had a long travel day, so when I got to LGA, I cancelled my meeting at my next stop along with my next two segments, and the AAngel in the LGA AC put me on the next plane to ORD so I could continue my itinerary. The next 3 segments went without a hitch. On a side note, 7 of the people on my plane were connecting in LGA to head to MIA. AA actually held the MIA flight for an extra 20 min after scheduled departure time so that the folks on my plane could run to the gate next door to board their plane. Even though my flights got screwed up, kudos to AA for helping all those other folks stay on schedule. ^^

Contacted AA via website - got a reply back within 24 hours! ^