Here are a couple of SAAS items - one is a look at security and the other is a look at some apps available via SAAS.
A deep dive into SAAS security with Google Apps.
SaaS Aggregation firm, SaaSMax, has a few apps that ISP's might want to look at including some D-Link stuff.
"D-Link® CloudCommand(TM): D-Link CloudCommand enables Solution Providers to provide their end users with all of the tools needed to deploy, configure, secure and manage Wi-Fi networks remotely."
'Mavenlink is the #1 project management and collaboration solution in the Google Apps Marketplace."
"PyraSolutions is an inventory and maintenance SaaS App that simplifies tedious and time-consuming processes involved with keeping track of inventory, scheduled maintenance, warranties, and work-orders."