Not really, I think. It's never been safe to install binary packages from one distribution on another, and despite the large volume of Debian debs available for ARM no-one should be installing them on a Maemo system (with the exception of things like Easy Debian, obviously). There's no particular reason to think that it would be any harder to MeeGo-ify an RPM than it already is to Maemo-ize a deb. In either case you're going to have to rebuild it for the target OS at the very least, and given the UI differences probably take on some more proper porting work.