It's been announced that Codemasters' rather well-received 2008 racer, Race Driver: GRID, is now available for download via the Xbox 360 Games on Demand service.
It's available right now, pretty much everywhere (except Japan), with pricing to of course vary depending on where you are. In the US, for example, it's $US30. In the UK, it's £20, while in Australia, it's... AUD$70 (USD$65).
Kotaku AU Note: A quick check of EB ($55), JB ($100) and GAME ($60) puts that $70 price tag into perspective.