IDNs are wonderful, but please... don't waste money on random IDNs. Register meaningful keywords in major languages. Trust me, you'll be impressed. Do research. Sit in front of the computer for hours--even if deciding about just a couple domains.
There is an opportunity with IDNs (Russian, Chinese, Japanese, Spanish, Arabic, Greek, etc.) just not when it comes to random 'domain hacks' that no one can type in. Stick to the major languages!