Want a nice professional Logo for your web 2.0 blog or web app, try Logo Instant, they are providing web 2.0 logo designs for free. These are not those firsst generation web 2.0 beta tag logos, all the logos currently featured look professional and free to use.
You can download any logo available on the site and use it as a template for creating your own logo. Currently 25 logo templates are available for download, according to the site new logos will be added periodically. When you download a logo template you will get the layered PSD file which you canmodify easily using Photoshop.