Yesterday about 4:30pm eastern time I was flying my Bonanza from Dunkirk, NY (far western NY state, USA) to Syracuse, NY, normally a one hour flight. When I first departed there were two moderate, distinct thunderstorm cells, one to the northwest and one to the southeast of my destination airport.
Early in my trip these two cells were far enough from the airport that aircraft were still able to approach and land. However, as I drew closer to my home airport the two cells merged into one larger, more powerful cell right over the airport and there it remained, moving at only 5 knots or so (No. 1 on the image below) and dumping about 3 inches of rain with wind gusts of 55 kts. I heard later that the ILS was knocked out of service after a lightning bolt hit the ILS antenna.
Seeing this monster both visually in front of me as well as on my onboard downlinked radar display (which reported the tops of this cell at 50,000 ft), I knew my only choice was to divert to another airport and wait it out, rather than waste fuel flying an extended hold over some fix. Thus, I called ATC and notified them of my intentions to divert to Ithaca airport (no. 2 arrow). Ithaca was very hazy, but clear of storms.
Safely on the ground at Ithaca, I pulled out my laptop in the FBO and connected to their free wireless network. I had the intention of browsing some newsgroups to kill some time when it hit me: Connect to LiveATC's feed of Syracuse to hear the status of the airport as well as when aircraft would again start landing.
After about an hour of listening to holding and ground-stopped aircraft, I overheard on the feed aircraft of all sizes landing and departing. The radar confirmed that the storm had moved northwest of the airport, so I knew that I was safe to depart.
Before this day, I had never thought of such a practical use of the LiveATC feed.