need help finding a small wireless rf keyboard

[dolph]

does anyone know reputations of any of these products or similar ones?
interlink another one, couldn't find the name

i'd like to get something small and unobtrusive like the ones i linked to. i don't need a mouse because i already have a logitech trackball, but the logitech keyboard is just too big. aside from the ridiculous price gap, does there seem to be any other differences? any other non-fullsized keyboards? tia.