apod - Astronomy Picture of the Day
sciam - Scientific American
arstechnica1 - Ars Technica
scalzifeed - Whatever (John Scalzi's blog. Or one of them, anyway).
I also created a feed for Escape Pod -- escapepod_feed -- thereby using my powers as a permanent LJ account holder for evil. Doesn't seem to work yet, but hopefully it will update itself within an hour or so and start working then. I considered adding a couple of others, but those should do for now.
Oh, and I suppose this is as good a time as any for a gratuitous use of the Escape Pod logo icon.