Hi Esh.
Yamaha are bringing their own expansion keyboard out for the T2 within the next month (think it's going to be shown on Sept 11th or there abouts at the Pakefield show in the UK) and also a pedal board. This one by Venus has been out quite a while and was posted quite a few month back. It looks pretty nifty but I'll be glad to see what Yamaha themselves come up with.