The iPhone hasn't officially begun selling in Asia, but hundreds of thousands are here already.
Some have doubtless made their way onto corporate networks. But a recent Forrester research note has urged CIOs not to allow the iPhone inside the enterprise firewall.
For one, it doesn't allow data encryption. There's also no way to enforce authentication policies since the device leaves it up to the user. It doesn't support push email, doesn't sync with PCs, and can't be remotely wiped.
So if any of your staff are connecting to the VPN via iPhone you better caution them now.
Admittedly, the iPhone is a first-gen consumer device. Most of these problems will be extinguished by the enterprise version, now in beta.
But it's part of a wider trend of consumer technologies invading corporate networks.
Instant messaging was the first notable example, going back several years. It's become an essential corporate application today.
Now the whole Web 2.0 phenomenon is making the long march through the enterprise - mashups, user content, wikis, social networking and virtual worlds.
These have obvious security implications and many CIOs would be torn between two instincts: the need to secure the network, and the knowledge that there is nothing more futile than trying to strike down a technology whose time has come.
Gartner's suggestion is that instead of completely blocking Web 2.0, IT groups should allow them to be deployed securely. As well as being incredibly popular, these are creative technologies with a potential to "unlock huge business value", as Gartner puts it.
Social networks for example. If you're a consumer goods firm, you can't afford not to engage in the brand-defining chatter that goes through social networks. That might mean finding a data mining platform. It might mean active involvement in dedicated SNS that are emerging in industry verticals and sub-verticals.
It might mean opening up the conversation with customers and partners via blogs or wikis, or building a platform that enables staff operating in a virtual world to integrate with your enterprise applications.
This is really where a CIO needs to play a leadership role. As any CIO knows, the easy part is understanding these technologies and how they work.
The bigger part is seeing how they can drive value to the organization, communicating that effectively to the rest of the organization, and then executing projects that realize that vision.
The iPhone may have to wait another day. There is hardly a bigger headache, or a more creative opportunity, for IT organizations today than responding to the web 2.0 invasion.