I have a Galaxy Tab 7.0 Plus, which I use for PowerPoint presentation. I bought a Samsung Tab HDTV Adapter Cable and a cheap Infocus IN10 projector (eBay, $70, 1400 lumens, 2.5 lbs., only had 150 hrs. on 4000-hr lamp), and an M1-HDMI cable (Monoprice, $12). Use the built-in Office Suite-compatible software that comes with the Galaxy Tab. Total weight (important for travel) is less than 5 lbs./2.5 kgs. Note: YOU HAVE TO plug the Tab's own power cable into the HDTV adapter next to the HDMI port in order to power the port! All this works because it's all DIGITAL (VGA is analog, HDMI AND M1 are both digital connectors). TAB -> HDTV adapter cable -> HDMI/M1 Cable -> Infocus projector = portable powerpoint presentation gear.