Glad to see someone is jumping in there to help with this! Thanks. I use both products and would love to see a full and proper integration.
I’ll mention one situation I noticed recently on a moderately busy site (using WPTouch Pro and WPSC 1.1). The two are mostly working very well together. With Wptouch, we have a separate front page defined, /mobile-home. WPSC creates this cached version properly. After a while a /index-mbile.html also gets created. Once this happens, the rightful /mobile-home/index-mobile.html is ignored, and all mobile traffic gets the wrong cached file. And, this one, while labeled index-mobile.html is not the mobile theme. I am guessing it is caused by a disconnect between the user agents between wpsc and wpt. Or, someone is switching to the desktop theme, and that gets cached and then served to all mobile devices.
Otherwise, it is working well for me. Next week I’ll try 1.2 and see if that helps things.