We still haven't been given a yes or no on the All Star Game. As the Magic 8 Ball has said, there are some technical issues within the distribution system to the stations that are being worked on at a feverish pitch. If the past is any indication, if it isn't working to a certain standard, FOX will not take the risk.
The All Star Game was always a maybe and from what I have been told, to make the All Star Game means that certain major milestones are having to be moved up. From what I hear, FOX Sports wants it pretty bad, but right now network (they are two separate divisions who answer to different VP's) has more important issues such as the antenna dish repointing project that has to been completed next week or parts of the network go dark. If it goes dark, you will not have SD much less HD. I personally spoke to a network guy last week and asked him if he had done any work with the splicers and he told me that no one in the TOC had really worked with it yet since their attention has been on the dish repointing project.
Based on that, I would say there is a 40% chance, but until we hear a no, there is always hope. And yes, IMHO, if the All Star Game is in HD, it will be beta test version HD broadcast and it will more than likely be full of technical bugs. I don't think the venue will have too many problems, my concern is the splicer and how it will work since it will be the first time EVER on line and there is always trepidation with new technology. If you can't stomach that, then I would suggest you watch it in SD and save your blood pressure. Then if all goes well, (and I THINK IT WILL) I won't need that ambulance on standby! ;)