Microsoft will be offering a beta of Exchange Server 2010 Service Pack 1 for download in parallel with Tech·Ed North America 2010 this June. Tech·Ed Web site has some great reasons as to why you should attend this year, but here's a few more: Sessions, sessions, and more sessions. In case you haven't looked at the Session List, there’re 695 technical sessions available. There more than a dozen Unified Communications breakout sessions. Unified Communications sessions will help you get up-to-speed on what to expect from SP1. You'll also find several Hands-On Labs, interactive instructor led sessions, and more! You can find the full sessions listing, and you can access it from your mobile device.
More info: Register for Tech·Ed North America 2010