This isn't necessarily an answer; it's some amusing searches and information that might help others get a "real" answer. (It just seemed too much for a comment.)
I'm not familiar with this setup, so I resorted to "Google-fu".
A quick Google search found A10 English, Anglo-Dutch defense. Following forward with 2. Nc3 Nf6 3. d4 e5 shows only a single game (but see below): Haring vs. Freiberger, at the Werther 2000. One game is not going to give you much theory to go on...
My search was simply "1. c4 f5", for those wishing to play along at home. Hopefully those 365chess.com links work for people without accounts; it's free, but they sometimes hide things behind log in screens...
I've found that 365Chess.com's game database isn't the most robust, so I did some more searching, and found this pdf claiming this is the Rittenhouse gambit, with 5 games played (all with dates between 1972 and 2001, inclusive).
Unfortunately, that's where my trail led dry... I'm finding several links online of people calling this the Rittenhouse gambit, but no real information ON the Rittenhouse gambit.