Just weird. I've browsed the web on my cell phone via wifi while leaning on the microwave as it's heating a bottle of formula and had no trouble.
It may just be a matter of speed reduction.
- In college, I'd sometimes watch DVR'd TV shows over my wireless connection while sitting on the sofa in the livingroom. I recorded the shows at the 12Mbps MPEG-2 setting. Normally, I could watch with no problems.
If someone used the microwave out in the kitchen, the playback would start skipping.
- At home, I've got a wireless headset that I use with Skype. If I'm on it while in the kitchen and I turn on the microwave, it causes distortion to show up on both incoming and outgoing voice data.
So I think it won't kill a connection completely, but it will increase the local noise levels quite a bit, so you're going to get more retries, which translate to slower overall throughput. This would be more noticeable on realtime applications that require the full amount of allocated wireless bandwidth, and are thus less tolerant of the lost/retried data packets.