Four generations and still going strong.
Generation 1: Clan Llama Slayers
Back in 2007, Nightgunner5 took an extra-curricular class where he learned the basics of web design. The class used Microsoft Frontpage, as well as Adobe Dreamweaver and Flash (at the time, it was still Macromedia).
The result was somewhere between the result of a food fight and Strong Bad's website.
View generation 1
Generation 2: LlamaSlayers 2.0
Generation 2 was never released. It was "beta" for its entire existance. It looked much better than the original website, but was too small and had a bad color pallet.
Generation 3 was largely based off of generation 2.
View generation 2
Generation 3: LlamaSlayers.net
Generation 3 was created when LlamaSlayers moved to LlamaSlayers.net. It is based off of generation 2 as well as a GooglePages template.
The WordPress theme "Modern Blue" is based off of generation 3 of LlamaSlayers.net.
View generation 3
Generation 4: LlamaSlayers
The website is finally back to purple, the LlamaSlayers color. Generation 4 takes parts of each of the previous generations and mashes them together to create something both visually appealing and functional.
It even has a special version for mobile browsers that support CSS3.