I installed Ghetto Tweets a few months ago.  There is a pretty good review about it, here

Overall it’s a fun little app to play around with.  Minutes worth of fun.

Some examples:

Here is @BarackObama talking about Ted Kennedy.  Here is the real update

@BarackObama

Here is @LeviPBlauvelt talking about me.  Here is the real update

@LeviPBlauvelt 1

Here is @LeviPBlauvelt again.  Here  is the real update

@LeviPBlauvelt 2

Here is @scobleizer talking about @biz.  Here is the real update

@scobleizer