Simply-Buttons v2 is a technique to create good-looking & cross-browser buttons that is inspired from:

• How to make sexy buttons with CSS
• Rediscovering the Button Element

The buttons are created with pure CSS and, optionally, improved with JavaScript (code is provided).

They fit to any text & come with 3 states: inactive, active and hover.

P.S. Their compatibility is tested on IE6 IE7 FF(PC/MAC) Safari SafariMobile Opera(PC/MAC).

Badges are the popular design elements of the Web 2.0 look.

Below, there are many Web 2.0 looking badges which can be used in banners & other graphic works.

This vector glossy badge set includes 21 different colors:

http://www.bittbox.com/freebies/free-vector-badges-glass/
Package includes AI, EPS, and SVG format.

This set includes 9 different colored and shaped Web 2.0 looking badges:

http://www.dezinerfolio.com/2007/04/23/web-20-badges-free-download/
Package includes PSD and PNG format.

This is a 7 piece Web 2.0 badge package:

http://www.jay-han.com/2007/10/06/7-web-20-badges-vector-download/
Package includes EPS format.

4 piece web badges set:

http://www.toptut.com/2007/09/10/web-20-badges-download-glossy-free-psd-file/
Package includes PSD format.

This is a sunny badge set with very nice gradient usage.

http://www.flying-people.com/2007/10/10/20-free-sunny-buttons/
Package includes PSD and PNG format.