KDE starts like an app from the maemo app menu. Once in KDE desktop you can run maemo apps from xterm. I've got shortcuts for these with icons on my KDE desktop so that I can launch my favorite maemo apps quickly (Canola2, FBReader, SDict, etc). A few apps like Maemo Mapper don't work well this way, but most do. KDE gives me things that maemo didn't (especially decent PIMS & a doc viewer) so I'm running my 810 pretty much exclusively using KDE as my desktop environment. To go back to maemo from KDE requires you to "logout" so I've just been staying in KDE. It took a bit of tweaking to get it set up just right but it's been well worth the effort IMHO.