[ale] bonding two broadband connections

[lists at serioustechnology.com (Geoffrey)]

I'm looking for a firewall product (software or hardware) of reasonable 
price that will take two broadband connections and bond them together.

Does anyone have anyone experience with such a product?  I know 
smoothwall does, but it's $2k, and that's well outside the price range 
I'm considering.

-- 
Until later, Geoffrey

Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety.
  - Benjamin Franklin