This should solve your wi-fi tether woes. It has for everyone else so far, myself included
android-wifi-tether - Wireless Tether for Root Users - Google Project Hosting
And Im in CWR right now about to flash this miui-ics hybrid. Lets see what this bad boy does.
Update - OK so I flashed it in CWR and received this error after it was nearly finished,
"assert failed: write_raw_image("/tmp/boot.img".
"/dev/block/mmcblk1p15")
E:Error in /sdcard/miuiscotland_Defy-1.11.9-ICS.zip
(Status 7)
Install aborted.
So I go back and reboot, and my X boots into BootLoader with the error numbers A5,69,4E,00,23
With the usual Battery OK to program Connect Data Cable. Gona leave it there for now.