Nokia's recent announcement of the upcoming N810 Internet Tablet is very exciting news for mobile Linux enthusiasts. We have already covered the initial announcement, but this followup discusses some additional details about the N810 operating system and development platform that have been revealed by Nokia's Maemo team.
The N810 will ship with Nokia's OS2008, which is based on Maemo 4.0 (codenamed Chinook). Significant API changes between Maemo 3.2 and Maemo 4.0 prevent some applications from working on both. Fortunately, the Maemo 4.0 beta SDK has been available for some time now, making it possible for developers to get a head start on updating their applications for compatibility with the new platform.
http://arstechnica.com/journals/linux.ars/2007/10/22/looking-at-the-technical-details-of-nokias-n810-internet-tablet-operating-system