Compatible Keyboard for P550

Hi,
Can anyone recommend a portable, foldable keyboard that they are successfully using with a Mio P550?
I've looked at many keyboards but they don't list the P550 as a compatible device, even with the latest driver updates.
I'd like to use it in lectures etc, so size is important!
A small QWERTY keyboard therefore fits the bill.
Thanks in advance,

Have you tried 'Transcribe' mode? Where you write on screen and it converts to 'text'. A bit of practice and you may find it's faster than using a keyboard, that's if you can find a compatible one.

Thanks for the hint: I'm currently using the 'Transcribe' mode - which is a great feature and reasonably quick however I'm pretty useful with a keyboard now (getting a lot of practice!). If I can find a keyboard that works well and fits the bill I'm hoping to use the PDA as a miniature notebook.
Thanks again,