Making it a full features FTP app may be going a little far. Right now QWIX is cool becuase of its functionality and ease of use. If you start adding things that the "average" xbox newb can't handle, you'll end up with a lot of "problems". (read: idiots don't take the time to figure out what theyre doing before they try to do it, then complain when it doesn't work).
Granted, I like the idea of being able to access XBINS directly from QWIX, then choose to download and install directly to the XBOX, no need to store the file on my HD, extract it, then upload it.
However this could ultimately lead to a reliance on XBINS; if they were ever to be shut down, for whatever reason, that reliance could prove troublesome. I have proposed previously in the Avalaunce suggestions thread a solution that I feel could aleviate any potential problems like that. I have thought a great deal about it, and I honestly think the following "solution" would be in the best interests of the entire community.
Develop a decentralized file sharing system using principles similar to what torrent/overnet/freenet uses, however with one major difference. The files available for download are released/controlled by their authors. A validation key system could be implemented allowing authors to make files available on the network, maintaining their own directories with the latest versions and older versions for compatability/archival. End users will be given a simplified, structured interface that allows them to "browse" to the file they want installed (maybe a directory structure, just keep it simple to find the latest version of the exact file they are looking for). The file/s, once selected would then be downloaded from multiple sources and, depending on if support via the dash was there, auto-installed. End users could only "share" file/s they have previously downloaded, this would prevent users from contaminating the shared files with (porn, games, fakes, virii, other bs you find on other file sharing networks). Basically, what I'm getting at is "censored, protected file sharing". Bandwidth "shouldn't" be an issue due to the lack of unneeded network trafic and oversized files.
The only "real" problem I foresee with this situation is "who" determines "who" is a legitimate author making legitimate apps. I think the community as a whole could police people releasing crap by simply not downloading it, but how do you prevent someone from releasing unneeded content on the network without at least some kind of predetermined panel of trusted administrators handing out the "author" keys. Granted, I don't see how that would be much different then what XBINS does now. They ultimately choose what content does/doesn't get on their server.
Anyway, there are a few "kinks'" that could use working out, but otherwise I think its a pretty solid concept.