On March 21 Microsoft announced the slip of Vista to January 2007. Or more accurately we might say not earlier than January 2007. Don't confuse this post with a Microsoft bash. Operating systems are big, complicated platforms with giant, labyrinthine sets of hardware, software, peripherals, APIs, standards, and protocols to support. It takes a long time to get one right, and I'd rather they released it when ready than rushed something to market too early.
The reason I'm talking about this announcement is that the ship date for IE 7 may be tied to the ship date for Vista. IE 7 has been positioned as a part of the Vista release, and although a backrev version will be provided at least for XP, it's still a reasonable scenario that IE 7 will not go to GA status until Vista is in gold disk. This question matters to SSL of course, because IE 7 will in many ways offer the most advanced and user-friendly implementation of SSL Certificates to protect site visitors by any browser to date.