I don't have any Access-specific sites, but a lot of the stuff that's true of Web design also applies to Access. For Example:
"Colored or textured backgrounds, weirdly colored text or links, and a preoccupation with appearance over content are sure signs of a 'first generation' web site."
> Pablo PigCasso
"Before you put a really dark background on your web page, ask yourself this:
Why is it so much harder to drive at night than in the daytime?"
> Henri de Toulouse-LaTech
Both quotes from the Art and Zen of Web Sites (www.tlc-systems.com/webtips.shtml)
And then, look at Jakob Nielsen's site for lots of good reading on design issues:
www.useit.com/alertbox/