I've experienced 6000+ shortly. It was impressive in that SPi 1M scored 29.XXs with just default setting.
Here is OC test results under winter advantaged air-cooling. 32M SPi could be run with lower clock. Sorry for my crappy chip photos. ;)
http://kr.img.blog.yahoo.com/ybi/1/0...1170321632.jpg
http://kr.img.blog.yahoo.com/ybi/1/0...1170321632.jpg