Every once in a while a MailChimp customer will ask me, “Hey, MailChimp’s been great for keeping in touch with my loyal customers. But is there any way to buy or rent an email list from you guys, so I can promote my business to potential customers in my area?” That’s when I explain to them the perils of purchased emails, and the virtues of organically growing a permission-based list. I also tell them they could just look around for other local merchants who might have newsletters (or similar publishers in their industry), then partner with them. In the back of my mind though, I’ve always dreamed of creating a tool for MailChimp customers to make that process easier.

That tool would analyze your list, then scour the vast database of MailChimp customers, looking for similar publishers to recommend. But this idea has been on the back burner for years, because such a tool would require 1) a vast database of MailChimp customers, and 2) the ability to analyze it–fast. Well, going freemium back in 2009 kinda helped with requirement #1. We’re at 1.2 million users, and manage over 800 million email subscribers for them all. And launching our Email Genome Project helped with requirement #2.

Helloooooo, serendipity. Finally, we have all the pieces we need to build Wavelength: a MailChimp service that uses a massive amount of email data to help you find publishers who share something in common with you:

Wavelength doesn’t help you send a promotion to another list, and it definitely doesn’t give you other lists or email addresses. It simply shows you screenshots of other newsletters that some of your subscribers read. The goal is to help you contact those publishers and maybe form a relationship with each other. Ideally, you can link to each other and help each other grow your lists organically.

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I’ve put my business cards in quite a few fish-bowl drawings, because the amount of personal information I’ll give away for a free chili-cheese burrito is astounding.

At some point, the proprietor of such a card-collecting eatery might pay her angsty nephew to hand jam those email addresses into a spreadsheet. Odds are that one of those addresses is going into that list with a typo. The same thing happens with a single opt-in webform (huzzah for double opt-in).

You might think most of these typo addresses are going to bounce when you send to them, so no big deal—typos are merely a minor annoyance and occasional source of hilariousness. And when they bounce, you’ll just clean them up then.

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We recently released a cool little WordPress plugin called Social that pulls the conversations on Twitter and Facebook about your blog into each post and makes it easy to broadcast to social channels when you publish. We were scratching our own itch. We’ve pined for a better way to handle comments on our blog, so we teamed up with our friends at Crowd Favorite to make a tailor-made solution. It turns out that we’re not alone. Ten thousand people have tried Social on their blogs too. After months of usage, we discovered a few things we could do better. Today we’re releasing Social 2.0 with a whole bunch of improvements:

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For those of you familiar with Soccer (or Fútbol for the rest of the world), there are few things as satisfying as hearing this: Goooooooooooal! (source: YouTube). It means we scored. Something good happened! Well, we want you to feel the same when you send an email and your subscribers show that they’re interested in your stuff. Today, we introduce to you Goooal, a new app from MailChimp Labs.

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OnStage is a tool that lets your MailChimp email campaigns take the stage to receive realtime feedback from collaborators and head honchos. We launched it 2 months ago for you to give us some feedback.

When Aarron first introduced OnStage, he ended the announcement with this warning:

We built OnStage quickly and rather than letting it languish in a state of perpetual polishing, we’re launching it today, rough edges and all.

We spent the last few weeks working on OnStage to get rid of those rough edges and introduce a few neat features in the process.

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