Linksys's products are polished, and considerate of the hacktastic. (Consider the WRT 54L, a special edition router that still runs Linux while the rest of the line moves to a proprietary OS.) DLink products, on the other hand, are fanciful. IP cameras with relays built in that can remotely trigger door buzzers, and all sorts of interesting kit that never quite works without a bit of fussing.
Maybe DLink is calling Linksys out for the stunt. And maybe they're just jealous they didn't pull it off first.
UPDATE: Of course, we know this isn't officially sanctioned messaging from the corporate PR team. But we still love to hear about Networking giants clashing like highschool rivals. It's what we live for!
Hands-on Review: D-Link V-Click GSM/Wi-Fi Phone [Yahoo! Tech Blog]