May I ask, how long did you both take to get your supporting documents together for the visa?  I'm wondering if my fiance and I should start after the New Year, because we're getting married here at the end of March, and want to file for the visa a.s.a.p. while he's still in the States.
Since my husband lives here with me (he's a dual citizen) it was easier for us to gather everything over the course of a few days. I think it took less than a week for us. 
Included in my package was:
-my old and new passport (I had the new one with my married name issued before I applied)
-original birth cert. (just mine)
-original marriage cert.
-4 months of my bank statements
-a letter from my husband, authorizing his sponsorship
-a copy of his passport that I made on my computer
-a letter from DH's aunt stating that we are intending, and invited to stay in her home until we find a flat of our own 
-Telephone records (a year's worth)
-Passport photo (possibly the worst one of me ever taken)
-Completed and printed out online app with biometrics stamp on front
And my IO requested the following yesterday:
-the mortgage/deed to my DH's aunt's house
-Pay slips or a letter of employment verification from both of our jobs
HTH!