Unsurprisingly it is a Battle between Tornado team "Bumpy(aka Jamie Livingston)and MachoMan (aka Kenny Pierce)" and Randy Smyth on his trimaran (Sewsew).
There are also two Weta trimarans, two Hobie 18, bunch of Hobie Adventure Islands, and a few homebuilt boats.

In class 4 (sailing monohulls) Allan Stewart with his father
"DancesWithSandyBottom (aka Paul Stewart)and SOS(aka Alan Stewart)" are leading with brothers Gougeons "Yellowthing
(aka Meade Gougeon)and sawhorse(aka Jan Gougeon)" on I505 close behind.
Since every boat in the challenge has running SPOT, race progress can be watched in real time on this page
http://watertribe.com/Events/ChallengeMapper.aspx?RaceID=EC2011
To make a sense "who is sailing what" you can get info from this page
http://watertribe.com/Events/ShowRosters.aspx, choose EC2011.