I'm going to bump this thread again, because this app was a perfect companion for Easy Debian on the tablets, and there's nothing like it for Maemo 5 that I'm aware of. If pipeline is gone, and nobody else wants to make this happen, I'll probably take over this app and port it myself to Maemo 5. That is, if mime types and associating applications work the same way in Maemo 5 as it did in OS2008.