Upload pictures directly from Bridge to Flickr or other photo sharing site.
But flickr is the most important. Many people are searching for a plugin or patch or something to be able to this.
Because of that many people are using Picasa because you can download a plugin for it and then with this plugin you can upload photos to flickr directly from picasa. Please make it also possible in Adobe Bridge.
I'm dying for good Flickr support for Bridge as well. There is a plugin for Lightroom that's great, but since Bridge doesn't support plugins AFAIK, Adobe needs should step up and add it. Course, plugin support for Bridge would be great too.