Imgbox has cleaned up their bugs and it works great. I wonder what their business model will be... Hopefully not the Photobucket story repeated.
I find 800 pixels wide is a good format for posting to the AGF and I recently posted 100s of guitar factory pictures. Imgbox gives you a configurable thumbnail with every picture you upload. I set it to 350 pixels wide and to retain the aspect ratio which is a useful size for posting to the AGF.
To get large numbers of pictures into 800 wide I wanted a script that could run automatically in a photo editor for no out of pocket cost. GIMP works well once you figure out how to navigate its complex feature rich menus (similar to full blown Photoshop).
I installed this script and it works great! You can resize a directory full of pictures after setting a few parameters.
https://github.com/easytechguides/batch-smart-resize