well, choice definitely is a good thing, and creating and maintaining such a repository takes a lot of work and dedication for which I am and I believe others as well will be grateful. however, the problem that the other repositories face and make them less usable is the fragmentation of the Zaurus. The total number of Zauri user is quite small to start with compared to devices like the Palm, and the fact that the Zauri isn't marketed and sold anymore outside of Japan by Sharp and that the original systems are all in Japanese does not help matters either.
now the biggest problem is the compatability of the software. a lot of the software only run on specific Zaurus distros and some will only run on specific models due to reliance on certain drivers.
most applications also have dependencies on other libraries and those libraries are very different from distro to distro and even between different versions of the distros.
maybe what we need would be a nice searchable and browsable repository like what you have done but you need to be more precise about what version of the app can run on what specific version of the distro. you can put that into the expandable details section, but this kind of information is essential. For example, a qt/e based application that works on Cacko does not necesarrily work on Opie and and vice versa due to the usage of different ipk formats and library dependencies. some older applications were able to be run on for example both distros in the past because the libraries were almost the same version, but these days, things have changed a lot and most applications will not run on either distro unless it was explicitly compiled for it.
at the moment, each distro have their own feeds and the feeds contain short little descriptions of the packages but often those short description don't tell you much. a software repository with categories and screenshots would be much better and that's why the idea of another repository is good, but it will be difficult to maintain and setup in order to be useful. The pdaXrom site has a nice repository with screenshots, descriptions and list of dependencies... BUT its way out of date, ie all that is for pdaXrom 1.0.5. while the current releases of pdaXrom is 1.1.0 and there is nothing like that for the new version.
most of the existing repositories are either way out of date and in dire need of updating, or only contain a very small repository of applications.
i am not trying to discourage you, but in the contrary, i would welcome a better repository. i just want you to know the pitfalls that i think made the other repository less attractive and hope you can learn from their mistake and hopefully come up with something better