We've recently expanded our image handling capability to store images on fast Amazon Cloudfront backed by Amazon S3 storage servers. This should be mostly transparent to the majority of users. One change to the Location Editor has been introduced.
The image upload utility is positioned just below the editor as shown here:
This allows us to update the editor without having to update the embedded image upload plugin. Any future image uploads (including location images, galleries, map marker icons and so forth) will be automatically handled by our new faster servers transparently using the the controls you're already used to. The only control that has changed is the location WYSIWYG HTML editor describe above.