Now that (http://www.pocketop.net/index-flash.shtml) would be the perfect gadget for a Series60-phone. What do you think, would it be possible to write SymbianOS-drivers for this toy? Or does anyone know of any foldable BT keyboard?

You will never be able to use IRDA...unless you use the phone upside down... wait for bluetooth...and send Pocketop some emails....

"Pocketop is also considering producing drivers for mobile phones based on the Symbian operating system, although a decision has not been made yet. Bluetooth is another option being considered, but again there are no specific plans, said Ferguson. "Bluetooth would be very natural and obvious move for us," he said. "Bluetooth will be a core part of the future of mobile computing. Also, we aren't huge believers in converged device. For the majority of consumers the idea of modularity will be the favoured solution. You will have Bluetooth phone, a Bluetooth PDA and a Bluetooth keyboard."

http://news.zdnet.co.uk/story/0,,t269-s2122596,00.html

I have pocketop IRDA keyboard and I use it with my Compaq Ipaq which has IRDA interface on the top, exactly like 7650 :D
Pocketop gives you a special support with a mirror on the top for reflecting "rays". It works well.

Afaik they also offer display-drivers for all supported devices to switch the screen-orientation by 90, 180 or 270°. With that setup it would be easy to use, too.