I see where you're coming from, man. The old Cherokees were solid vehicles before marketing idiots turned SUVs into yuppie fashion accessories. Although I don't know of anyone who does the type of converison you're talking about, I can sure see the advantage of it. If you look at it strictly from a fuel effieciency versus money issue, it probably doesn't make sense. However, I think there's a lot of potential for hybrid conversions for performance reasons as well. If the system was set up right, after everything the internal combustion was putting out, there'd still be another 50-100 horses coming out of the electric. Even if the conversion added another few hundred pounds, I think the power to weight ratio would work out better. It's too bad these douchebag Prius things are giving hybrid a bad name among 'car people', because there's real potential for hybrid technology as a horsepower boost as well as a planet saver.