I received a private message from someone who saw this thread asking for step-by-step instructions for doing the OTA install. Here is what I did on my unlocked 8300 on the t-mobile network:
1. Open the browser (may be a t-zones link)
2. Navigate to www.operamini.com
>> This page will tell you that your phone model could not be detected.
3. Scroll down to the "Download high memory version"
4. Click - follow prompts to download and install OTA.