Maybe it's an idea to join forces with other flash designers and php-programmers, this product has a lot of power and it's the best I've seen on the net. To get it on a higher level you have to invest in it and make a roadmap with new features like flashvideo and a more extended administrator backend. I've also seen a lot of requests in the forum which are also interesting to deliver in a new version. Integration with CMS systems like Joomla and Typo3 would also be great, the same for a search facility and the possibilty to write comments on a photo.
If you have to work on imagevue besides your normal work, it's hard to keep up with all the new features on the internet (like Flash player 9 AS3 and CS3). Just let us know what your plans are, I'm curious!!