Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
Up to date [10/20/2010] item build for Hybrid Akali.
Using this build myself, I've been able to get scores such as in the link under this, ranked 5v5 at about a 1300 ELO.. not amazing I know, but for somebody that's only done a total of 6 ranked matches, 3 of which have been 5v5's it's good enough IMO.
--end game skill order--
R->Q->E-> rinse repeat, throwing in W as an AoE slow, as well as an amazing get away tool to keep yourself alive in sticky situations
Give the build a shot, and if you vote it down, please leave a comment as to why, and what you didn't like about the build.
~~will add more depending on how the build is taken by the public~~