IMHO two separate packages/versions aren't going to happen. When we're going to support Frodo (and possibly break Eden), normal users should still be able to just update (Software Update notification). Two different branches would also be a burden to maintain, so the Eden one wouldn't be developed anymore. The only sensible solution would be to rebrand the latest Eden compatible version to "xbmcremote-legacy" or something along those lines, and it probably wouldn't be maintained anymore afterwards.

The "visible" QML property also isn't an ideal solution. As the elements are still in the QML and it's sometimes screwed up. For example in the homescreen (music, videos, pictures) long press music or video, notice how the first item ("Show files") has a rounded corner, and click it. Then you long press the item again, and notice the "Show library" item (which is now the first one), it doesn't have the rounded corners. This is due to the first item, "Show files", being invisible, but QML still recognizing it as the first item and thus giving it the rounded corners (instead of giving the first visible item the rounded corners). When adding more and more (in)visible switches I think it would also add more of these minor glitches.

And in case you want to contribute, just join #xbmcremote on Freenode (it's hidden so you need to enter the name manually and can't search it). I'm mostly there between 4PM and 8PM UTC (which is 6PM till 10PM in western europe timezone). Don't really know about mzanetti as he has some kind of server which keeps him logged on.

I think you're best of asking mzanetti about it. But in case you're already familiar with Qt development you may download the source code from gitorious and run lupdate to generate a xbmcremote_tr.ts file (I guess it would be tr for Turkish) in the i18n folder. When you've got this file generated you can use Qt Linguist to fill in all the translations and you can send the file to mzanetti afterwards (using a merge request on gitorious, and I guess you could also send him an email to the address which is listed in the about screen of the app).