There is a nice component that I have tested and using now which gives this functionality and more additional options as well. It is Developed by Pedro from IMAQMA you can check the demo here
It is a good component, and the support is just great. I know he is adding more option because I am working with him on some of the features.
If you like what you have here, you will like what that component offer.
I totally understand YT position on not being able to release this app, as releasing an app is not just about saying here you go, it needs resources, planing, and above all a team looking after it, and maybe right now they are focusing on Zoo, WedgitKit and the Monthly templates. Believe me those guys are over stretched because it is not Just Joomla, it Joomla 1.5 and 1.7, and WordPress.
Also if you look at it from another angel, there is so much to do in these apps, so do not wish for something else, you might regret encouraging them to overload their operation as this definitely will impact their current operation.
From interacting with their products, I know that they have a motto, which is quality quality quality. You can see that everywhere in what they do, and that takes not just effort, rather going the extra mile and mile and mile.
This just what I think. and I think it is an opportunity for others to go ahead, develop an initiative and build on their tools if you can. I wished for many things that would be here, and realized that it could not be unless someone steps in and do make it happen. And since then, I embraced Zoo, its apps, and now I have been developing around it. Maybe soon we will launch our suite of tools that will complement the great work YT dose in Zoo. It won't be native Zoo, but it will support it in all possibilities.