Bluetooth DUN on Treo ... can't stand it anymore

Yes, I know that previously I reported some fantastic speed when I initially set it up, like 172kbps, and that was obviously pretty nice.
It's gotten progressively slower since then, and where I am right now, I get a whopping 32.9kbps.
This might have been fine in 1995 when I had a "pipeline.com" email address, but in today's world, this is not conducive to getting a whit of work done.
I've searched the web & treocentral for ideas on how to speed this up (my signal strength on the Sprint network is 3-4 bars, so it can't be that, can it?) ... nothing, except maybe a program called PDANet that allows Treo modem usage over a USB cable. Will have to get this and see if it works ... arrgh.