I just noticed that you can embed gists by pasting the url to the gist into the post editor on a line of its own. This uses the shortcode module of the Jetpack plugin so you need to Active the plugin and then the shortcode module.
this example is an applescript that creates auto-complete gifs for google searches. Not something many folk would need.
It is now possible to upload multiple photos on iOS using Mobile Safari to Glow Blogs. I am not sure when this change happened and if it is due to upgrades to iOS/Safari or the recent WordPress upgrade on Glow Blogs.
Here is a gallery uploaded from my iPad.
And here is another one showing the steps taken to produce the one above.