If anyone doesn't mind doing a little editing, getting web profiles in v2/3 based viewers to show OSgrid profile information is possible.
I found there are two keys for web profile urls in the settings.xml: WebProfileURL
The first key is for Second Life grid and, I didnt want to change how it worked on SL, so the second key, used for their beta grid, was what I modified.
To make the viewer use the WebProfileNonProductionURL key for profiles it has to be set to use aditi. I edited my shortcut to use
--grid aditi --loginuri http://login.osgrid.org
I then edited the settings.xml in the viewer install folder since this is reloaded everytime you run the viewer and changing WebProfileNonProductionURL
in debug settings wouldnt save.
Just open the settings.xml in your favorite editor and change the url for WebProfileNonProductionURL
Keep in mind that web profiles on OSgrid are still in development and may look a little rough and/or change often.
you can see what has been done so far here: http://i.imgur.com/3QHlN.png
*note: you will still have to use a viewer, like Imprudence, to edit your profile information since currently this only allows display of profile information.