Over at http://www.google.com/hangouts/, you can find the fancy new browser extension (at least for Chrome) that will give you persistent popup windows at the bottom right side of the screen. That's great and all, but minimizing the chat windows is a chore. Here's how to get them back in Gmail.
All you have to do is enable the new hangouts functionality in Gmail, as laid out here: https://support.google.com/hangouts/answe.... You are able to get the old chat back by simply disabling it if you're not a fan (for now), though I'm sure that will change at some point here in the near future.
Please share any user notes/tips/tricks with the new setup below.
Update: missed this earlier today.