According to an unconfirmed report, Apple is working on a higher end web authoring application to complement iWeb, much like they've provided a range of software applications for other aspects of the iLife suite.
"iWeb Pro" is said to offer an easy to use web authoring interface for small to mid sized companies. While the current version of iWeb is more of a complementary tool to .Mac, "iWeb Pro" is said to be a complete stand alone product. That said, tight integration with Apples iLife suite remain an important feature, allowing easy publishing of multimedia content.
This is an otherwise unconfirmed rumor, but published on Page 2 for discussion/interest.