Sony have announced
a downloadable game service for the PlayStation Portable:
The following first and third-party PlayStation titles can now be purchased for $5.99 from the PlayStation Store accessed through the PS3 system and played on the PSP system: Cool Boarders(R), Crash Bandicoot(TM), Hot Shots Golf(R) 2, Syphon Filter(R), and Tekken 2. Highly anticipated by gamers who want to re-live the classics from the PlayStation catalog, the launch of these PlayStation titles for PSP is the latest example of SCEA connecting its various platforms to deliver value to consumers. The initial lineup represents some of the most popular franchises in the PlayStation library across a range of genres that are perfect for pick-up-and-play gaming when you're on-the-go with your PSP system. Additional first and third-party PlayStation titles will be added on an ongoing basis to the PlayStation Store to keep, with a second batch of PlayStation titles slated for release later this month.
Not sure if this is available for Australians at this point.