Well technically, Flash requires a plugin as well, though most people probably do have it installed. I'm guessing that the The Java option is closer to plugin free though users would have to have Javascript enabled. some folks block Javascript and/or Flash these days. 

For interaction as opposed to just an animation, exporting vrml from Poser. should give the same viewing functionality that this application seems to offer but of course anyone who wants to view the model would have to have a vrml plugin installed. Also, vrml seems to produce some pretty large files, which the compression this thing touts might alleviate. I'd be interested to know how big a file with a clothed V4 would be.

Hopefully it would be a matter of just loading your model in DS, invoking the plugin and hitting export, so maybe not too much dabbling.

 

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken