I came across a very cool company the other day.  It's called Trialpay and they have created a very clever affiliate solution with an interetsing angle on things.

For anyone marketing SaaS applications to small businesses and consumers, i suggest you take a look at their story. 

Simple, powerful, and clever -- it seems to be a cool and easy way for SaaS vendors to potentially make an extra buck while leveraging the “bad news / good news" story wrought by the power of the modern web.

The Bad News...Software continues to commoditize and lot’s of free options exist.  Therefore, fewer and fewer customers are willing to pay for subscription software (Stopzilla, ZoneAlarm, Basecamp, Workspace, etc).

The Good News...Customers have more choice than ever before and are increasingly deaf to traditional marketing messages  This means COA is going up.  Therefore, more and more companies (Netflix, Blockbuster, Gap, etc.) are willing to pay a handsome bounty to those who can deliver customers.

In my humble opinion, this is one to watch for sure.