Nothing as of yet, I'm getting a trophy but holding onto a WM 6.5 phone, just in case, I could always log into verizon and do a ESN swap for a day till the hackers come out with one.
It's just a matter of time....
Keep an eye on XDA's WP7 area, they are more tending to hacking than it is here..
Edit: Here's a thread about some phones with Wired tethering... I double checked, WI-FI Tethering with any WP7 phone, locked or unlocked is not happening as of right now, maybe with Mango (fall time)
http://forum.xda-developers.com/showthread.php?t=929868