new hosts appearing between 2011-06-10_1000 and 2011-06-10_1500:
www.exacttarget.com
www.luo.bo
www.uni-muenchen.de

hosts disappearing between 2011-06-10_1000 and 2011-06-10_1500:
kh.edu.tw
www.ehu.es
www.harvard.edu