FAQ's
The K1 FAQ -- This page is an absolute necessity. It answered SO many questions.
Google's alt.visa.us.marriage-based FAQ -- Good but spammier than the K1 FAQ
Immigration: A guide to immigrating to the U.S. - Law offices of Carl Shusterman

PROCESSING TIMES
Service Center Processing Times
Dave Hollis' K1 Processing Times
K1 & K3 Timelines

FORUMS
Visajourney.com (formerly the BCIS forums) - the BEST place to go for answers!
BritishExpats Forum - US Marriage-Based Visas

GROUPS (I don't really use these, but you might want to!)
Yahoo UK/US Couples Group
K1 Advocacy Group

MISCELLANEOUS
Federal Poverty Level Guidelines
Check your USCIS case status online
Port of Entry Rolling List


UK - USA MARRIAGE RELATED PAGES

Steve and Lisa	Yvonne and Duncan	Angela and John	Becky and Dan
Otis and Megan	Kate and Clem	Benjamin and Jennie	Barbara and Simon
Craig and Jamie	Garth and Scarlett	Kay and Bill	Stacey and Lisa