Logitech k480. I carry it everywhere. Has a three way switch, iPhone, iPad and Mac. Only problem is it interferes with headphones/wifi somehow. Mac cries piteously when the k480 connects.
K380 is the non-stand version. It got me into low-profile keyboards. Even spent a while on my desk full time.
Other pluses: rearrangeable keys (dvorak), runs on AAA batteries.
The legends eventually fail, and the keys take a shine.
> k480
Logitech k480? Oh my god and it even has round keys!
I also like my K480, and got a couple for friends as well. One failed suddenly, and on opening the flat-flex had just come out of its socket. I like the sturdy rubberized channel for putting phones and tablets in. They hold in securely enough to carry it around the house and not have the tablet falling out.