@paradroyd @Shufei Yes, Bluetooth keyboards are still common. I have several pieces for my other devices.
But these keyboards with wired connection (here it is connected throught dock connector of Palm) are not so common now. I guess that only Apple has something with dedicated connector (for their iPads).
"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko