From what I have read from the BB so far much is still to discover from the new frontier that is the AH "Matrix".
What is for sure is that any arena terrain created up to this point may only be enjoyed by 8 of your closest friends (or not)at a time.
As for me, I plan on starting small by creating one hell of a close quartered inner-city tank battle extraordinare.
If someone else has had the same enlightenment please share your comments as I hate beating my head against the wall.
