Adding to the library of funny, interesting, off-the-wall, and popular Web 2.0 generatrs, badges, and widgets, MyCoolButton lets you choose the size, color, font and text for shiny new buttons, then download it for use on your site. There’s actually cool applications for these buttons…in this case I’ve created a fancy new button to make it easier for you to subscribe to the PR2.0 feed. For those interested in a small collection of of previous 2.0 accessories, see below. Web…