A List Apart: "Assigning accesskeys to menu items adds “Hot-Key” functions to a website, letting frequent users spend less time less time moving and clicking the mouse. This solution, however, has been largely underused because it almost always fails due to two major flaws.
The first problem is that visitors to your website have no way of knowing that you’ve assigned accesskey attributes to your linked elements. Even if they suspect you have, they would have to guess which accesskeys assignments you’ve created. In this article, we’ll look at how to solve this problem, enabling you to clearly but unobtrusively let your visitors know which accesskeys correspond with the links on a page."