Siliconera drops some knowledge about the Hong Kong PlayStation Store: Apparently you don't need anything but your credit card (from any country) to purchase games from there. In other words, connect to the Hong Kong PlayStation Store and see if there's anything you like. If so, nab it.
Right now the latest release in the muscular shooter genre, Rei Cho Aniki, is available on the HK Store for only $220 HKD (or $30 US). That's way cheaper than importing the physical version. And as Siliconera says, even if you're not interested in homoerotic man shmups, there is bound to be something that you like there eventually. When it does pop up, think of this method as the easiest and fastest import ever.
If it was up to me, all of the downloadable product for all consoles and regions would be available to anyone that wants it. Wouldn't that be nice?