Salaam,
The following are two articles on the issue of moon sighting. The first is by our Shaykh Muhammad Afifi Al-Akiti on the Fiqhi aspect and the second by Shaykh Hamza Yusuf on a more broader analysis of the issue. I hope this is beneficial.
http://www.masud.co.uk/ISLAM/misc/moonsighting.htm
http://www.zaytuna.org/articleDetails.asp?articleID=100
Was Salaam
Jashim
Islamopedia 
assalamaliakum Jashim.
Ramadan Kareem… Hope you have a terrific and eman-raising ramadan.
I would also like to point you and your readers to a great article posted (perhaps a bit late at least for start of this Ramadan) on moonsighting by Shaykh Yasir Qadhi:
Understanding the Controversies Regarding Moonsighting:
http://muslimmatters.org/2007/09/12/understanding-the-controversies-regarding-moonsighting/