It seems the same questions are coming up again and again, so here's an attempt to clarify some points.
What is iPhone Firmware 2.0? When can I get Applications/Enterprise Features?
iPhone 2.0 firmware is the next software update for the iPhone. It will include Enterprise features and support for the iPhone SDK and iPhone applications.
Regular customers will be able to download the iPhone Firmware 2.0 in "late June". Customers will also be able to start buying iPhone applications from the iTunes Store starting then. So for the next 4 months, your iPhone will stay pretty much the same as it did yesterday.
Read Full Article