Friendcaster is good, but...I still use the official app. Only the official app lets you see everyone's posts. Some people's security settings will keep their posts from showing up in any other app
i just go on with the web browser to the mobile site. Seems just as fast and avoids all of the background stuff that the dedicated apps are always running.
The facebook app drove me crazy because it was always running in the background no matter how many times I killed it. I just recently uninstalled it, and installed "Seesmic". It is working beautifully. Highly recommend it. Get it in the market.