Looks like I missed the excitement of 3, almost 4, blocks in a row.  But I did pop back with 1.2 GH/s just in time to catch this other nice one - squeezed by with 12 shares in 24 seconds.... 

#           Block found at      Duration   Total shares      Your shares
17974   2013-05-11 02:03:08   0:00:24      52466         12

Decided to give it a go with all miners using one worker...