+1

 

Here's a more expensive version...

http://eagleday.stores.yahoo.net/brmato.html

 

Bigger the better:

 

I use this:
http://www.lislecorp.com/tool_detail.cfm?detail=325
and can spread both pads back at the same time. I know it's made for a sliding piston caliper, but works just fine on my fixed variety. I catch the top of each pad, squeeze a few times (it operates like a caulking gun), and release. Doesn't touch the caliper. Cost is ~$40.