Hi, all. For anyone still using this phone lol..
After updating my phone to .629, tethering no longer worked. It would say something like "Your phone is not setup to be a wireless hotspot, go here to purchase a data
package." I came across this site and followed the steps using Radiocomm and it worked perfectly! I am now able to tether to my hearts content.
Tethering Droid 2 Global with Wireless Tether after 2.3 Gingerbread update - Android Enthusiasts