While the enterprise-enabled version 2.0 iPhone firmware isn't scheduled to arrive until June, Apple is letting a select few folks nab a sneak peek at the in-development OS. Here's a few highlights from Engadget's recent hands-on:

• "Exchange is so on! Changes are pushed over the network, but over WiFi it does check-ins, so it's not as instantaneous."
• "Well, the branded Cisco VPN screen has definitely been added to the VPN settings. We couldn't really test this one, but assume it works as advertised. We don't yet know if it supports SecurID or other hardware token authenticators."
• "By far our favorite new feature is multi-select in mail, though. Now when you hit edit you can select as many messages as you want and delete or move them as a group."

For more on the forthcoming firmware update:
- see this Engadget article [1]