gohan - your determination to cram your phone full of apps before their even out of development will be your undoing. Then again maybe I'm wrong and you're going to become a guru in matter of weeks. Either way I'll be watching your posts with baited breath.
If one of the ruby uninstalls fails then select the other one first. I had the problem you had so uninstalled the other one first and was then able to uninstall them both.