I would recommend checking out the [cooking.meta post here][1]; they pulled together a list of popular cooking blogs and other resources and generated an email campaign for a lateral distribution (rather than a top down like reddit, digg, etc.). If everyone pitched in and started an email campaign, or as they recommend just put together a generated chain (from their post) a la:

    [Dear whoever],

    [EDIT ME SO I AM AN IMPRESSIVE LETTER TO SEND TO A RESPECTABLE WEBSITE.]
    
    [Sincerely],
    [Us]


This might be a good model for the betas going public.

  [1]: http://meta.cooking.stackexchange.com/questions/196/get-the-word-out-food-blogs-and-press