Long time no post :). I want to compensate with this post: I have created for you 6 CSS3 horizontal (linear) menu classes. There's a download button below. Hope you will like them :D.
Feel free to use them in any project you would like commercial/non-commercial ones. Instead of redistributing you should send a link to this page. Thanks!
In the downloaded file will be a zip containing 6 folders, each with a .html and a .css file. It should be pretty easy to use them in your projects.
If you want to add more buttons remember to change the width of the menu, or the width of the buttons.