Sadly, I won’t be at WWDC this year. I thought I had all much ducks in a row, but it looks like it was not meant to be. Here’s my take on what will be announced:

• iPhone OS 3.0 will be announced, and available on Monday. This is based on the fact that iTunes 8.2 was released last week, with support for iPhone OS 3.0. Hopefully this will avoid the server overload that Apple experienced during the iPhone 2.0 upgrade last summer.
• No new iPhone hardware. The time that is spent on the iPhone during the keynote will be related to the OS, not new hardware. If we see new hardware, we’ll see that at a special event later in the month.
• Snow Leopard Release Candidate or Golden Master. At this point, Snow Leopard should be ready to go. If there are any last minute API changes we might see a release date later in the summer, just so that devs can get their apps ready for the release.

I don’t think we will see any new hardware at WWDC. WWDC is usually about software, and not hardware. I know they introduced the iPhone 3G last year, but I think that’s the exception, not the rule. Only time will tell.
UPDATE
Well, I was mostly wrong. We get iPhone 3.0 SW on June 17th, new iPhone 3GS (and I’m just outside of the 30 day return window,) and Snow Leopard won’t be out until the fall.