As far as I understand, Sencha-Touch contains a subset of Ext JS classes/functionality. The gridpanel for instance doesn't seem to be part of the package. Could I use the touch-support together with the full Ext JS package?
I think this will not work, cause sencha touch is totally new written and use the same namespaces than extjs. So it's not a subset of extjs. So if you would put both together you will be in big namespace trouble.
i think if you need for example a grid in your sencha touch app, you'll have to write a new lightweight grid for sencha touch. The UI part, cause the store part already exists. i think there is no way to use Sencha Touch with Ext JS.
Offtopic: Lets organize a Ext JS Europe Meetup and discuss such topics ;-)
GridPanel is something that we have been thinking about but won't make it into the 1.0 release. We don't want to put the Ext JS GridPanel into Touch, but rather create a touch optimized grid from the ground up.