I've been testing Force Close this morning and am having mixed feelings about it.
1) Messages does close and I still get my e-mails, but if I close BBM or WLM I can't receive any messages.
2) Funny thing about WLM after closing it, the icon on my homescreen shows I'm logged in, but when I click it to send someone a message it starts the login process as if I was logged out.
3) I was hoping this could be the answer to closing T4BB and having it open up on the last read tweet, but it goes to the top just as if I had closed the app normally. What I've had to do is back out of the app and leave it running in the background so when I open it again it stays at my last read tweet.
4) I Force Closed the browser and phone, but it gives me a message that they will be restarted after the Force Close, so I'm not sure what the point is in regards to them.
5) One thing I'm definitely not a fan of is that after Force Closing any app, a pop-up saying it`s done comes up, but the app's instructions page shows up behind it. After clicking "OK", you have to close this page but ironically, you can't Force Close it!
It does seem to recover some memory, but I can`t say about battery life yet. I think this app has a lot of potential if it could get some of these issues sorted out. Hopefully you'll be working on it and have an update soon.
Cheers!