Can't use BFL/Avalon/etc. ASICs for LTC, although you should be able to use them with other sha256 based currencies like PPCoin.

At this point it seems GPU is the only way to go for LTC mining.  Are there any other alternatives on the horizon, say FPGA? I'm guessing the RAM requirements for scrypt hashing make GPU the only reasonable mining solution for awhile, am I wrong?