When I saw this thread I almost crapped my pants! The XV6700 ppc is one of my favorite devices but I run stock WM5 on it. I'll see what I can find for you as far as a 6.1 ROM goes. I don't believe XDA deals with the old Apache. Would a 6.5 work for you? I've never had the desire to flash a newer version because I heard they were full of bugs.
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When u hit the walls of sanity, u have no-where to go....