Sony GT Academy 2010, lets you demo Gran Turismo 5

Sony announced today, that it’s GT Academy 2010 time trial challenge will be launching December 17th exclusively via the PlayStation store and it has been confirmed by VG247 that it would be the “first opportunity” to get your hands on Gran Turismo 5.
As mentioned in the blog post,

The taster will be a single track for the 2010 GT Academy competition.
The GT Academy will run in the following countries:
UK,
Ireland,
France,
Switzerland,
Italy,
Germany,
Austria,
Denmark,
Norway,
Finland,
Sweden,
Spain,
Portugal,
Netherlands,
Belgium,
Australia,
New Zealand.
However gamers in countries not mentioned on the list need not fear as there will be a special Gran Turismo 5 Time Trial Challenge for them to get to grips with it, too, more information on the challenge can be found here.