Today I made some custom grey CSS3 buttons for the WP-pagenavi plugin. You get two CSS files in this download. One style is rounded and the other has a more button feel to it. You can easily change the CSS3 gradient colors by visiting Colorzilla and choosing a color you like.
Scroll to the bottom and see a rounded WP-pagenavi example: http://zeaks.org/
Sorry downloads have been disabled.