If you have a food blog, and are looking to expand your networking and/or traffic, you might want to check out FoodCandy.com. It's a social networking site like MySpace, but for foodies only. Actually, you don't have to have a blog to join. You just have to be a foodie. Much like MySpace, there's plenty of stuff like friends lists, comments, pictures, surveys, etc. There's also places to write your own stories or review "places."
If you are a food blogger, the Food Candy site has an aggregator that you use to sydicate your site. This is a great way to increase traffic to your site (if you are concerned with that type of thing), or reaching new readers.
If you join up, look me up and add me as a friend. My FoodCandy username is ApronGuy.