Can ASIC or FPGA boards be used to mine Litecoin? I know that Litecoin was designed to be mined with a CPU but then someone figured out how to mine it with a GPU. 

Has anyone figure out how to mine Litecoin with an ASIC or FPGA boards, and if not is it conceivably possible? (and by that I mean would it be more effective)
Yes, there are designs for Litecoin mining FPGA bitstreams, but they are not very efficient currently. ASICs are much more efficient and if anyone finds it lucrative to invest in development of Litecoin mining ASICs, they will push out GPU mining. (The efficiency ratio between ASIC and GPU will be lower than with Bitcoin though).