Very nice website. If you could add coffee, you could count me as a lifetime member. Oh. I would change the color scheme. Maybe adding some brown would not hurt or making the green more minty.
I drink coffee too, but are there really enough different coffee recipes to have a social network around them? (I'm much more into tea than coffee, and have just in the past month started on coffee so this is a serious question for you). I like the idea of having maybe different categories, tea, coffee, but would there be enough variations of coffee to do that type of thing?
Coffee can fit nicely here I believe. After I graduated, I started drinking coffee and fell in love with it. (My GF believes I have an unhealthy relationship with trying different blends and styles - ie latte, mocha, etc). However, there's a fairly large market for coffee lovers when it comes to blends and also coffee machines.
Do a quick search for "coffee machines forum" and you'll see what I mean.