Dell Venue 8 Pro charge+data setup - $8.25 FS
Saw this (DVP8 data+charging setup) on Slickdeals and am passing it along. Basically, you set a switch on the cable to charge, to get DVP8 to start charging, then set switch to data. Apparently, charging continues. Should work other tablets as well. Cost = $8.25 FS from DealExtreme.com.