I don't know if this has already been diaried but I use Politico's Super Delegate Tracker to follow the ins and outs of who's for who and this evening they jumped their number of Supers for Obama from 219 to 222.
I also use demconwatch as they are pretty good at providing additional information on the march toward Denver.
To make this short and sweet, Politico is showing that Obama picked up one of the two Add-on's from D.C. (Alexander) and Thomas is shown as uncommitted.
Politico is also showing that of the two Add-on's selected today in Missouri, one has endorsed Obama (Montee) and the other, Jay Nixon, is shown as uncommitted.
The remaining Add-on Politico is showing Obama gained today is Rob Carver from Delaware.
So the totals now for Supers according to Politico is:
Obama 222
Clinton 250
Only 29 more to go before Obama takes the lead here as well.