This is a great plugin. I've been looking for something exactly like this. The only thing I can't get it to do is use image as the link.
As far as I can tell, you can only wrap text in the anchor. Perhaps, an alternate syntax could be added. Such as:
[link id='123']my link text[/link]
[link id='123']<img src="pic.jpg"/>[/link]
Thanks for making this plugin.