Apple is reportedly saying they have "discovered that many of the unauthorized iPhone unlocking programs available on the Internet cause irreparable damage to the iPhone's software, which will likely result in the modified iPhone becoming permanently inoperable when a future Apple-supplied iPhone software update is installed."
What does this mean to all us unlocked iPhone users? It means do NOT update your firmware yet, is all. The update is due out this week sometime, and iTunes doesn't force you to update, so just don't. Within a few days, there will be a fix out for upgrading unlocked iPhone's to the new firmware, not to worry. Just make sure that when it first comes out, you don't do the update yet.