Yes, I use Plucker but it is a problem to use with the standard BeBook. The default reader doesn't support the Plucker format.
There is alternative firmware around that changes the inbuilt reader to FBReader, which does support Plucker, but to get it to work you have to zip the plucker file up and rename it .fb2 so it is a little cludgy. But it works fine, and I how I use my Bebook usually.
There is also the OpenInkPot firmware which has FBReader built in.
My preference is to use plucker as it integrates into web browsing really well (see
plucker-e-book-workflow), but for true books I'm tending to use other formats more.