The N800 is the successor to the 770:
Image from Carrypad Gallery
Resources:
- Ars Technica Review
 - The Nokia N800 - and Its GUI shortcomings from a Newton developer's perspective
 - Nokia N800 Review; A Real World Analysis After One Month’s Use - a bit on the enthusiastic side, although there are some interesting facts buried in the article.
 - Engadget
 - Carrypad
 - LinuxDevices