Flavours Icon Set
Oliver Twardowski, a graphic designer from Bonn, Germany, has put in a lot of time and effort to release this handy icon set especially for Smashing Magazine and its readers. His set, aimed to help designers in their Web and user interface designs, contains 177 icons in a resolution of 48×48 pixels. The files are available for in the PNG and PSD sources, so you can modify the files as you wish.
Cute Tweeters Icon Set
This set was designed by the talented Mirjami Manninen, an illustrator from Finland who released the beautiful RSS feed set Feed Me Animals on Smashing Magazine last year. This new set contains eight transparent PNG icons for Twitter, available in resolutions of 128×128 pixels, 256×256 and 512×512. The sources are in EPS files (for CS4 and CS3), PSD files and AI files (for CS4).