With all due respect, this still lacks the polish of traditional well-crafted raster buttons. Having looked at (what seems like) all CSS buttons in existence, I am not entirely convinced that CSS is actually capable of pixel perfect replication of Photoshop goodness. At least not at the moment.

More importantly though - scaling the button up or down while keeping it exact visual appearance typically requires readjustment of its accentuating details - the transparency %ages, stroke weights and colors and what not. This effectively renders the very idea of CSS buttons void - they can be scaled, but it will distort them, so the scaled up/down versions are basically no good.

-- Gallery of buttons that I yet to see CSS versions to match up to --

[1] http://dribbble.com/shots/239089-Dialoggs-Login-Animated

[2] http://dribbble.com/shots/201485-Yo-check-it-iOS-UI-

[3] http://dribbble.com/shots/173658-To-project

[4] http://dribbble.com/shots/191108-Let-there-be-sense-

[5] http://dribbble.com/shots/199327-iPad-app-sneak-peak

[6] http://dribbble.com/shots/98510-Starred-Checked-Action-Butto...

(edit) - shortened list a bit, it is easy to get carried away with this stuff.