You might have noticed that Facebook changed last night. Inline photos are a little bigger, the top bar a little blockier, and a news ticker now rests in the upper-righthand corner for real-time updates.
This latest flurry of updates caps off a steady flow of tweaks over the past few weeks. You now subscribe to your friends' updates as you would an RSS feeds. You can subscribe to people you're not even friends with. You can organize friend groups by type (in Google+ fashion), not just for chat purposes. And you also have more on-the-fly control over who does and doesn't see your wall posts. All of these features come together to make Facebook feel different, even if it's fundamentally unchanged at its core.