Back in October, Apple CEO Steve Jobs promised to release its iPhone SDK to developers by February 2008: "We are working on an advanced system which will offer developers broad access to natively program the iPhone's amazing software platform while at the same time protecting users from malicious programs," Jobs wrote in an open letter to the development community. Assuming Apple meets its self-imposed deadline, the transformation from locked-down device to full-fledged iPhone platform portends a deluge of new applications--what remains unclear is just what kinds of features and services developers will choose to target, as well as how much the limitations of carrier partner AT&T's EDGE network will impede the creation of web-based apps.