With PSN games now being released on the Sony PSP system (especially shooters), wouldn't it be great to see Soldner X on the PSP or DS? Sure, the graphics would need to be scaled down a lot (especially on the DS), but the gameplay would be intact. Super Stardust Portable and Everyday Shooter have shown that it can be done successfully.
Features we would like to see in a potential PSP version would be co-op play in the single player campaign. For the DS, I'm sure the touch screen and extra screen could be put to good use. What would you like to see in a portable Soldner X?