I may be late to the game on this, but I just found a Firefox add-on for quickly uploading to, and posting pictures from, your Photobucket account.
https://addons.mozilla.org/en-US/firefox/addon/photobucket-uploader/ Once installed you just right click on any image on a web page and select "upload to photobucket". It will then open a bar at the top of your current page with the image tags to easily copy/paste. You can also use it to upload pictures directly from your computer if you right click on the image, then select "open with Firefox". You can then right click on it again and do the same as you would for uploading a picture from a web page.
