I've seen the european update up on the website since the 16th. Anyone have any idea when the US will receive the update?

No idea. If you look at the release notes, though, all it says is "Minor Bug Fixes." Doesn't sound like too big an update.

I've installed 1.07 on my EU unit and haven't noticed any improvements at all. In fact I had my first "issue" after installing it: the phone went into CarPlay mode and the head unit would say it was attempting to connect to CarPlay but eventually it would give up. Only way I could fix it was to disable carplay under smartphone settings and then re-enable.

Spotify is still just as broken for me on this release.

Even if it came out today, I wouldn't install 1.07. Not with IOS 8.1 right around the corner. In fact, I'm surprised Pioneer would even issue an update when everyone's going to be updating to 8.1 shortly. Just sounds like it could cause more problems than it could solve.

Right now, except for the annoying audio popping issue, my CarPlay works just well enough for me to avoid any further Pioneer involvement unless I know exactly what the benefits would be, and that the update wouldn't cause more problems.