http://stackmobile.com/ - towards the bottom
Neither the main logo, nor the meta logo is workin.
This is sort of working, but be aware that a not insignificant refactoring of how we host images for SE sites is ongoing*.
We're trying to avoid any outages, but...
Also, if you're caching images without ever checking StackAuth for updates you'll probably want to fix that in the near future.
I'll update once we're done.
Looks like we're good to go.
*Not something I'm doing, so I can't make strong promises on how it'll end up