It can get in the way, but it helps me a lot, just typing part of the word for a site, then clicking/arrow keying to the one I want.
Awesome. Also, I checked the source for that page to see how they did the button-clicking thing, and saw this code:
<xul:button xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"id="errorTryAgain"label="&retry.label;"label2="&robots.dontpress;"oncommand="robotButton();" />
LOL, there.is.only xul!
That is so awesome......I hope I'm not the only one that got the reference...