I recently created a promotional video for Mimbo Pro 4 - showcasing the newest functionality from the theme.
I've been really pleased with how Mimbo Pro has done on WordPress.com and a lot of the new functionality and developments have developed because of working with the team and users at wp.com.
One of my goals with Mimbo Pro 4 is to merge the wordpress.com and wordpress.org versions of the theme into one. When we first moved Mimbo Pro on to wordpress.com we had multiple versions of the theme, one for each site, and this made updating the two of them a pain. As such the stand alone version of the theme got left behind. This is no longer the case and will make future update of the theme much quicker and easier for all.