Finally, the saga appears to be nearing an end:

Arsenal can confirm that they have agreed terms for Samir Nasri to move to Manchester City.

The 24-year-old midfielder, who has spent three years with the Gunners, has been omitted from Arsenal's squad which flies to Udinese this afternoon and instead will travel north for a medical.
 
The move will be subject to Nasri passing a medical and formal registration processes.

Given previous reports that have suggested that an agreement regarding personal terms has been in place between the club and Nasri for some time, it may even be that the player is unveiled at some stage today.

UPDATE: Nothing official so far in terms of an announcement but some of Nasri's former teammates have been quick in tweeting their thoughts:

Whilst a future teammate welcomes him to the club: