We may have seen a working model of Garmin-Asus' Nuvifone GPS smart phone at Mobile World Congress in February, but apparently it wasn't working well enough. Engadget tipped us off to an unfortunate delay announced in Garmin's investor conference call on May 6, where CEO Cliff Pemble told analysts that "we would anticipate that some devices will hit the market in various locations throughout the second half." The phones are going through carrier certification right now, he said.

"We certainly haven't performed to our expectations, but we believe we have a very unique device and we still have a lot of interest in the device from carriers," Pemble said in a transcript on SeekingAlpha.com.

Garmin first announced their Linux-powered nuvifone in January 2008. This April, we heard it might come out in June. Obviously, that won't be happening.

Garmin still expects to sell $100-200 million in Nuvifones this year, CFO Kevin Rauckman said on the conference call.