Yes, we've discussed the BeagleBoard before and if you look at earlier posts in this thread you'll see a reference I made to a more powerful, similarly sized product called the PandaBoard.
There are a lot of small ARM based systems.
And Nvidia's planning on moving the ISA to desktops and servers.
ARM ISA was on desktop PCs i.e. Acorn Archimedes(1987), Acorn Risc PC(1994), Acorn Network Computer(1996, with Oracle's support), Acorn Phoebe (1998, prototype Risc PC2).
