cd /Applications
chmod +s SwirlyMMS.app/SwirlyMMS
chown root:wheel SwirlyMMS.app
chmod +s SwirlyMMS.app/SwirlyMMS
chown root:wheel SwirlyMMS.app
to get it to actually load.
In the System-->General-->Network-->EDGE Settings I've got the APN as "live.vodafone.com:8080" and the username/password fields empty.
In SwirlyMMS I've got:
Proxy: 172.030.038.003:8080
APN: live.vodafone.com
Username & Password are blank
I even managed to send it to a Telecom cellphone.
You may or may not need to turn WiFi off beforehand. I use "BossPrefs" to turn "Edge" and Wifi on & off as it's quick.
Now we just wait for SwirlyMMS v3.0 which adds receiving capability.