1.4/2gig/128ss
Streamed a couple of TV shows and a movie last night and has zero issues. I ran into the freezing issue with Hulu a few times over the course of 2 or 3 hours, but that seems to be a Flash/Mac issue, not a MBA issue. I monitored iStat while running Hulu and nothing was even remotely putting a strain on the MBA.
I went form 100% battery to self shut down from 8:45 until 12:28 last night, which nearly 3 hours of that was streaming video. It's not 5 hours but for streaming video and the fact I have been migrating my media wirelessly the entire time from my backup HDD not to bad.