While searching for a "trivial" wait animation for one of my AJAX projects I've found a great online solution for the problem. It has been around for years now, but it's new for me and I decided to share it.
Introducing http://ajaxload.info/ a free AJAX load animation generator. It's great to have it around.
Here are some images I've created briefly as a showcase ..... well I guess they already have your attention :)