Installed this beta4 on a ThinkPad T410, 4GB RAM, 1280x800 display, SSD drive. Seems pretty fast, the Emacs UI is nice, everything is VERY responsive.<p>It detected only 1024x768 when it started up, which made things look blurry; fixed by going into the Screen app and changing it. Haven't figured out the Wifi yet, but the Ethernet was detected and worked immediately. With both Web and WebPositive browsers up and with a page or two loaded, 1.2GB RAM was in use, total, for everything.