I've been using the LG Eve GW620 Android 3G phone from Rogers for a few weeks now. I'm extremely impressed by the platform but it is ready for prime time use by heavy business users?
It's awesome if your company is already on Google Apps or Gmail as it synchronizes automatically with your email, calendar, and contacts plus uploads pictures directly into Picasa. There are no extra applications to install or web accounts to set-up like you have to with a Blackberry. You also don't need Blackberry Enterprise Server (BES) to make everything insantaneous and eliminate the typical 10 to 15 minute delay for email. Keeping everything in the Google family certainly makes everything simpler to set-up and simpler to use.
One limitation I've run into is the inability to create new calendar appointments that include other attendees. Also, I can't run real time stock streaming software like Quotestream, however, I've opened a ticket with Quotemedia to see if there is a work around. (Update: Open this link directly to install the mobile Java version of Quotestream Wireless. It works but cuts off the edges of the window if you hold the phone horizontally instead of vertically)
The Android phone platform is definitely growing rapidly. I was surprised to see that Android has 27% market share compared to iPhone's 54% market share for mobile ads displayed.