I currently run an Excito B3 device as my main router. Originally shipped with Debian installed, I got Arch Linux installed on it last year. I then decided to keep the original U-Boot despite its problem with L2 cache preventing it from booting any kernel newer than the 3.1 branch. Since then, the community did an incredible work, integrating the B3’s board first into ArchARM’s custom kirkwood kernel and then even in the mainline, and porting the board to the newest U-Boot.