I believe Charlie Lee used Scrypt because of Tenebrix's claims of its resistance to GPU, FPGA, and ASICs? How was it Charlie Lee's fault that Scrypt was not resistant to the development, and creation of specialized hardware for it?
It implements a proof-of-work scheme based on scrypt, a cryptographic construct specifically designed to resist creation of efficient GPU, FPGA and even ASIC implementations. You can find more about scrypt and how it can improve your stamina, masculine appeal and performance here
https://bitcointalk.org/index.php?topic=45667.0
We really liked Tenebrix's Scrypt proof of work. Using Scrypt allows one to mine Litecoin while also mining Bitcoin. We humbly offer a big thanks to ArtForz for the implementation.
https://bitcointalk.org/index.php?topic=47417.0