PR backlog -- ping us!

As you probably know, we've got a lot of pull requests in the hopper. Thanks to everyone who's been triaging these lately.

I've just gone through and tried to add comments about what's left to be done with each to make them mergeable. (9 times out of 10, I'm saying "add an example and unit test" :wink: If you submitted a PR that you feel is being ignored, feel free to ping those involved by adding a comment to the end of the PR that summarizes what issues are remaining.