Terrible keyboard? Android supports USB HID devices so just use whatever keyboard you normally use. I use my HHKB [1] when I am on the go which is 1000 times better than the on-screen keyboard. I also have two monitors at home and at work, so I agree that replacing a real setup with 10" is terrible. If you would connect that Nexus 10 to a 24" or so monitor at work that would be a much better solution.

[1] http://elitekeyboards.com/products.php?sub=pfu_keyboards,hhk...