Here is a present list.
Photogenics - http://www.idruna.com
Artizen ZE HDR - http://www.supportingcomputers.net
Photosphere - http://www.anyhere.com
HDRShop - http://gl.ict.usc.edu/HDRShop
The first 2 have more than 10x the amount of HDR features that Photoshop will have for the next 2 years.
The last 2 offer are more basic but HDRShop is the only one to be able to unwrap Spheres and Photosphere works on the mac.
I hope i've made an acceptable case.