The Watchman's Post, a Messianic site with great articles and information related to prophecy and the end times: http://www.watchmanspost.com/

The elegant, timely, grace-filled writings of Dr. Jay Worth Allen (and much, much more): http://www.drjaymissdiana.com/writingspage.htm

International House of Prayer: a missions base with sound doctrine and an aggressive outreach with particular emphasis on youth. http://www.ihop.org/

Last Days Mystery: contains links to numerous other end time prophecy sites, and includes transcripts from debates with leading Pre-tribbers. Also includes a great deal of information on the feast days. http://www.lastdaysmystery.info/

End Time Pilgrim: an excellent site with a positive emphasis.
http://endtimepilgrim.org/

Christian Media Network: http://www.christianmedianetwork.com/