A couple of quick thoughts about BSG that don't involve spoilers (mostly discussion of the iTunes Music Store approach to watching TV):
After we finished watching the "season 2.0" DVDs, Kam and I didn't want to wait for the "season 2.5" DVDs to come out, so we downloaded the rest of the episodes from the iTunes Music Store.
My overall feeling about the experience was mixed.
On the one hand, it was great to be able to get the episodes before the DVD came out, and quickly and easily from the comfort of our own homes. At $2 per episode, it's about the same price as the DVDs, and if you buy the whole season (which we didn't), there's a significant discount (about $25 for 20 episodes). Each episode took about 10 minutes to download over a broadband connection; not quite instant gratification, but faster and easier than going to a video store. (Though I suppose going to the video store is faster than downloading five or ten episodes.)
On the other hand, the image quality for the iTMS episodes is relatively low. Certainly good enough for watching, and in fact better than the quality of some of the episodes we taped off the air last year before we gave up on that approach. But the flickery patches that indicate heavy compression or low encoding quality are distracting and annoying; definitely not DVD quality. Also, no DVD extras; especially no deleted scenes, some of which have been quite good in earlier seasons.
So I may end up buying the DVDs even though I now own most of the season 2.5 episodes in electronic-only format.
The other non-spoiler comment I wanted to make is entirely unrelated: I find it weird and confusing and distracting that the "Previously on Battlestar Galactica" segments regularly contain dialogue--and I think even visuals--that didn't happen in the show. The people who put the BSG "previously"s together are fairly good at summarizing a nigh-unsummarizable show (though not as good as the Alias previously-makers, who imo are the best in the business), but I'm not sure why they're showing us scenes that appear to have come from alternate histories of the show.