One thing that makes MailChimp unique is its open API, and the number of 3rd party integrations that have resulted from that (check them all out here).
Here are some recent integrations:
Hootsuite (share campaigns to any of your social networks, view campaign results, and more... all from within your HootSuite account)
2. Pinterest (send automatic e-mail campaigns with content from your pin boards)
3. Instagram (send automatic e-mail updates from your company's Instagram feed)
4. and, finally, Zendesk (deeper integration between MailChimp and everyone's favorite support tool)
Patents may have been created to help encourage innovation, but instead they regularly hinder it. The US Patent Office, overwhelmed and underfunded, issues questionable patents every day. "Patent trolls” buy too many of these patents and then misuse the patent system to shake down companies big and small. Others still use patents to limit competition and impede an access to new knowledge, tools or other innovations.