Two days in, and I can tell you neither of them is perfect. FriendFeed can't see my Facebook status. Apparently this is some sort of glitch that affects people who tried to add Facebook to FriendFeed after the "new" Facebook was released. The app developers said back in May they were aware of this problem and are working on it; obviously they haven't solved it yet.
Less critical, but still annoying: despite my telling Lifestream.fm that I was in Minnesota, my posts are time-stamped for Central European Summer Time (seven hours ahead of Central Daylight Time), which affects what day they're credited to. Sigh. Lifestream.fm is based in Germany, I believe.