The installer will patch 1.8 minecraft.jar's to the requisite 1.7.3 minecraft.jar now. Same download as always.
Download - http://bit.ly/pgJHxW
Edit: Note there was an issue with the install via login method at first that I couldn't test with Minecraft.net being down when I first posted the uploaded. Its all fixed now and just redownload if you need to use that method of installation.