Last week the gap widened a a tiny bit going back up from 19 to 22. But now its back down at 19, which is must a bit a bit disconcerting to HRC given her recent PA win.
A picture is worth a thousand words:

Marc Ambinder reports from Philadelphia:
PHILADELPHIA -- It wasn't so much that Barack Obama had real fight in him tonight, or that more people attended his rally in front of Indendence Hall than any other event since he announced his candidacy. It was the spontaneous demonstration of support that happened when it ended.5,000 people (at least) had nowhere to go but up Market Street. Obama's charge of the night: "Declare independence!" was with them. They started with the familiar "O-Bam-A." By 7th and Market, they had graduated to "Yes we can!" By 10th and Market, with hundreds streaming in between cars on the road, they were just cheering. At first, a few Philly cops, killjoys, tried to rough the crowd to the sidewalks. It didn't work. The cops retreated to the sidewalks. By the time I ducked into my hotel, a full mile away from Independence Park, the Obama crowd was still marching.
Since the beginning of the week Obama picked up 6 superdelegates one of whom switched from Clinton to Obama reducing the gap down by 7 superdelegates in 4 days.
Obama:
+ DC Add-on Harry Thomas, Jr. (switched from Clinton)
+ Oklahoma Add-on Reggie Whitten
+ North Carolina Rep. David Price
+ North Carolina Rep. Mel Watt
+ Indiana Rep. Andre Carson
+ Minnesota DNC Nancy Larson
Clinton:
- DC Add-on Harry Thomas, Jr. (switched to Obama)
+ California Rep. Jackie Speier
| California DNC Aleita Huguenin is still linton, not uncommitted as reported before
Totals:
Clinton: 251
Obama: 232
Hopefully tomorrow we can get some more.
On the whole a good week for Obama.
And still no giant superdelegate shift in sight.
We got us a diary, kind folks, speculating whether Obama suffers speech impediment and whether that's uuuunnnnn-presidential.
Looking the size of the diary, I have consulted with doctors and found out that a diarist is suffering from what is called in medical terms "SHORT DIARY" impediment. That is the diary is ultra short.
Also it seems to lack any substance, but that diagnose will have to be done by watching a video tape of the diary being red.
It might be contagious too.
Today, in a latest "fallout" from "bitter"-gate the American Hunters and Shooters Association (AHSA), composed mainly of gun touting citizens endorsed Obama.
As a gun rights organization we have not come to this decision lightly. We were formed two years ago because our research shows that millions of gun owners wanted a change. They not only wanted an organization that would protect their gun rights but an organization that was also committed to the protection of their communities as well as the protection of our lands.We reached out to the Obama campaign several weeks ago to offer our support and approval as was reported by Paul Bedard of US News and World Report.
We believe recent attacks on Senator Obama's stand on the 2nd Amendment and his commitment to our hunting and shooting heritage are unfair and American Hunters and Shooters Association is stepping up to set the record straight.
This makes this pro-gun liberal very happy.
Gallup Poll Daily tracking shows Barack Obama with a 51% to 42% advantage over Hillary Clinton for nearly a week now.
Individual polls are problematic, but this is showing a beginning of a trend.

From Politico Counter.
3 endorsments, 1 switch to uncommitted and one on the fence.
More endorsements came down for both Barack and Hillary today.
In last 7 days, the superdelegate gap has narrowed even more.
Barack Obama has gained 7 delegates (think of it as 1 per day) while Hillary Clinton lost 2 delegates (who are now uncommited).
According to Politico superdelegate counter the gap is now 24 superdelegates.
Is it still an avalance if you are buried not by boulder but by many, many pebbles?
· NV-2: EMILY's List Endorses Jill Derby (Sven at My Silver State)
· Democracy Corps: Obama's Youth Lead Still 60 - 33% (Mike Connery)
· KS-Sen: Senate Guru Interviews Jim Slattery (Senate Guru)
· NV-2: DFA Endorses Jill Derby (Sven at My Silver State)
· Pour Some Sugar On Cindy (McCain) (Cliff Schecter)
· Online Presidential Debates Will Be a 1.0 Affair (Mike Connery)
· CO-SEN: Schaffer says immigration reform impractical, decades off (em dash)
· Straight Talk Express Sports Obama Bumpersticker (Jonathan Singer)
· McCain Touts Safety of Nukes at "China Syndrome" Plant (Jonathan Singer)
· The Edible White House Lawn (Tracy Joan)
· SD: John McSame in Sturgis (lowkell)
· MN-Sen: What Franken needs to win (MN Campaign Report)