I purchased this awesome device at an amazing discount (50% of the listed price on amazon) through an electronics retailer (last, slightly scratched display piece). Light little thing, it's usage takes a little getting used to, but once you're used to it, it's as good if not better than other netbooks.
I purchased it for perl and python development on the go, as well as a big in-the-field preview of the photos taken by my Nikon D90. Works out perfect for my requirements.
1. NV Tegra and Android: It's an android device, so the apps are light and snippy. Not to mention a clean ARM processor instead of bloated hardware like the x86 Intel Atoms and compatriots running MS Win bloatware.
2. Light as anything, thus easy to carry and use.
3. Full fledged keyboard makes typing a breeze.
4. USB, Mini USB as well as an SD card slot makes storage expansion a non issue.
5. HDMI out, so connect a monster 60 inch TV if you dont like the 10 inch display.
1. NV Tegra and Android: Android and ARM device, so most of your common desktop MS software is out(alternatives available, but not the same feel).
2. Android 2.2 (last update) doesn't completely support all keys of a Hard Keyboard, so some software dont recognise keys completely just yet (terminals for eg.).
3. No touchscreen: Takes a lot of getting used to if coming from another android device to this one (wasn't a problem for me. I prefer consoles anyway :) )
4. No 3G modem: The 3G model is a better choice as it allows for access on the go (Toshiba AC100-10U Netbook, nVidia Tegra 250, 512MB, 8GB, 10.1", Android, 3G
5. No Android market by default. (Fixable, but slightly involved process)
Note: The notebook underperforms with the Android 2.1 OS. The upgrade to 2.2 makes the notebook much more usable and handy. Custom ROMs built on top of the official ROM make it quite a powerhouse for my purposes.