Does the idea of having a personal networking assistant on Twitter sound good to you? If so, check out Mr. Tweet. He makes recommendations based on who the people that you follow, follow, on who they RT, etc..
Mr. Tweet is free to use and seems to be on the money most of the time as far as I can tell. He also offers a service (free as well) that sends a tweet to those you've just started to follow I didn't leverage this option thus far, but I do think it's a great idea.
Check it out, let me know what you think.
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