Season 3 updates

A few things that I noticed:
First off, you need to update your build to match the Season 3 items/update.

On that note your item build can use an upgrade; Haunting guise now goes further into another item.
While we are still talking about items it is important to note the new use of Death-fire Grasp, as a lead in to your ability combo, not as a last hit in the combo. Death-fire is basically another Rabadon's when timed correctly.

I also see a problem with Void staff. Void staff is something designed mainly for dealing with MR tanks, a percentage based magic pen item vs a magic resistance reduction item such as Abyssal Scepter is something that needs to be thought through. Void for MR tanks, Abby for everything else.(only reduction based items can essentially do true or bonus damage.

Your build also has a huge gap as far as mana is concerned, you have basically created a 1 burst pony. I would advise making a swap: Banshee's Veil for Zhonya's Hourglass. Not only will this solve the mana issue, but it will give your combo a chance to work by taking 1 spell against you out of the equation and giving you bonus HP for the second damage dealt. Zhonya's may give 2 seconds of invincibility but isn't that what your blink ability is for?

Ok, enough of item talk, onto the build itself!
Obviously I know this is your first guide but you need to make sure that you don't release it too early, I would advise "archiving" this guide, edit it some more, then re-release it as a truly finished product. If you need people to review it and help you work on it, you can find guide reviewers all over the site.
General guide issues:
-Short on details of game-play
-You got a little excited and added a few too many Icons
-You could use more BB coding other than icons
-could use some more art, by that I also mean:
videos of game-play(examples)
pictures of the champion
section headers

One you get used to the season 3 updates go ahead and finish this sucker off, good-luck :)