Cover which is the lock screen I currently use on my Android phone, got purchased by Twitter today. Cover’s neat trick is letting you peak into apps from the lock screen. This follows the purchase of Aviate by Yahoo! earlier this year, which I also was actively using. I guess this makes me an anecdotally good indicator.
The main subject of posts about this purchase seems to be speculation about what Twitter might want with a lock screen utility company. I think that’s a fairly obvious, Twitter updates without unlocking your phone.