I think i've linked to Lindsey Stirling's (aka cute geeky violin girl) Zelda video before. Well now she's done a Lord of the Rings video as well. It's not _quite_ as awesome as the Zelda one IMHO, (*cough* she looked a lot cuter and geekier in the zelda outfit than in a dress *cough*) but it's still pretty geeky and awesome :)
(And as usual, i'm getting all my awesome video references from Topless Robot, still need to find more sites like that.)