If you are really picky about your logos, I suggest learning to do them yourself. Adobe Photoshop is what I personally use, but I know some people who use Adobe Fireworks or other image manipulation programs. There are plenty of great guides out there to teach you how to make custom Web 2.0 style logos, and there is a Photoshop guide they’re putting the finishing touches on specifically for UserLogos.org which will be up soon.