You can't mine litecoin with current ASIC mining devices. Different encryption (scrypt)
If anyone's considering mining litecoin, mid- to high-end AMD cards are the best (and kinda the only) option. CPU mining leaves you with a hot CPU, a high power bill, and little money to cover it. GPU mining is where it's at.
I decided to begin mining yesterday. I was lucky enough to already have two AMD cards that are great for hashing, as well as two separate machines to run them on. I have one machine with a tahiti-based 7870 running 7 and cgminer, and another machine with a 5850 and BAMT (Debian-based distro that runs off usb and is just mining tools). I average a combined 800-100 KH/S right now, and I'm making around 16 dollars a day doing it.