I've got a rooted Droid 2, and I use Barnacle Wifi Tether whenever I need an emergency internet connection on my laptop.
I use default settings except for turning on the MAC/NAT filtering.
The problem I keep having is, despite having 4 bars of 3G service, the connection occasionally stops transmitting data. It doesn't say the connection drops on the phone, and my laptop doesn't see the connection drop, but data just stops transmitting.
Generally this isn't a problem for web browsing because I can just hit refresh 30 seconds later and the page will load, but it is obnoxious when I am chatting with people online because it might take 30 seconds or so before I get a bounceback notification that a message I tried to send timed out, and in the meantime I don't know if I've been missing incoming messages.
Does anyone know what the problem might be?