I'm making available a beta of Operator 0.9, which has support for Firefox 3 and uses the built-in Firefox 3 microformats support.
The primary focus of this release has been performance, and I believe it shows. Sites like the Samsonite Store Locator are MUCH faster. Note that if you want to improve performance even more, you should remove the adr microformat from your toolbar. I've done this for new installs of Operator in the future. Since most pages with adrs have them in hCards, I've moved all the functionality that was for adrs into the hCard submenus.
Other changes include support for whether or not hidden microformats are displayed. You can try this out on the Samsonite website. Note that this functionality doesn't work on Firefox 3 because it required a change to the core Microformats support which hasn't made it into Firefox 3 yet.
Other small changes are the addition of searching for tags on amazon.com products, as well as searching for addresses on MapQuest.
One thing that is NOT in this release is modifications to support the new RDFa spec. We're still waiting for some stuff to be finalized for that.