The stylesheet is released free of charge under a CC0 Public Domain Dedication and MIT License, so you can use it for both personal and commercial work. Go grab it from Google Code or the Github page and let us know about any improvements you make!
?HTML 5 Reset Stylesheet

Permission is hereby granted, free of charge, to any person obtaining a copy of any version of this file on Google Code or this file on Github (the �gSoftware�h), to deal in the Software under the terms of the CC0 Public Domain Dedication, or,alternatively, to deal in the Software under the terms of the MIT License.