The result is Tweet Lanes, which I just released for phones running 4.0 and above.
The big ticket items are: borderline theft of the Google Talk & MMS app styling; New take on composing tweets; Reply to multiple tweets at one time, or block multiple spammers in one action; VolScroll - navigate the feed with volume up/down buttons; and plenty more.
App & screenshots can be found here: https://play.google.com/store/apps/details?id=com.tweetlanes.android