They have been discontinued and can be purchased for a reasonable amount used. Very nice little Atom based capacitance touchscreen. Here are some of the specs from the Joggler Wiki. There are two documented OS implementations with work well with it. One being Ubuntu 11.04 Linux and the other being Android 2.3. Just recently getting MS XPSP3 running on it. It does well. Its a bit smaller footprint than the Chumby (Infocast) 8". I removed the internal WLAN and replaced it with a USB stick. I am though playing with it right now using a 1.8" microdrive and have ordered a new USB SSD drive for it. Its a very impressive little touchscreen. With some hardware modifications it would do well mounting it on a wall maybe customizing a power injector for it.
I'm thinking of keeping one on my desk just to play with different TS stuff using Ubuntu, Android or XP on it as its easy to swap the OS.
Based on Intel's Poulsbo/US15W mobile chipset.
CPU: 1.3GHz Intel Z520 Single-Core, Hyper-threaded, Atom CPU
Chipset: Intel US15W (400/533MHz FSB)
Graphics: Intel GMA500 (with hardware acceleration for H.264, MPEG2, MPEG4, VC1, WMV9)
512MB RAM (NOT user upgradable - not easily anyway)
1GB internal filesystems (soldered, non removable)
1MB EFI bootloader and nonvolatile parameters (socketed)
Wired Gigabit Ethernet. Realtek RTL8111C
WiFi B/G/N based on the Ralink RT2870 chipset (connected to the internal USB port).
Audio: IDT STAC9202X5 Audio with 2 speakers and a 3.5mm headphone jack
USB (High Speed USB 2.0 Ports):
1 x external.
1 x internal (+2 with soldering).
Power: 5v DC
Screen: 7in Sharp LQ070Y3LG4A 800x480 LCD, 16m colour (24-bit), LED backlit, capacitative touch-screen
Size: 180 x 130 x 115mm
Weight: Approx 650g