nixgeek...
I think maybe you misunderstood gazzland's post.
He's looking for a download accelerator-manager, not the webpage accelerators you pointed out.
gazzland...
I use Speed Download, available here http://www.yazsoft.com/
it has a free trial period, and it's well worth the modest registration fee.
(disclaimer) I have no association with yazsoft, other then that of a satisfied customer.
AH yes, you are right. I did notice one that showed up on versiontracker.com when I searched for the web accelerators. Don't quite remember the name though. It should show on one of the links I supplied from versiontracker.com.
It probably doesn't help if you google for "asselorator" -> "accelerator" would be a better term. If you ever search for software for the Mac, you can enter search terms into www.versiontracker.com and www.macupdate.com search fields, and usually you'll find something useful.