xsMerge App is referred as an Advanced Free Mail Merge tool, and it is that indeed.
However there is an important Monetizing Opportunity around this xsMerge App for Google Apps Resellers, Google Apps Specialists and IT Consultants on Google Apps.
Deploying, customizing and getting the most out of this App for your Google Apps Clients would represent a great deal of help for them and a monetizing opportunity for you, as the GApps expert.
We are willing to support for Free any reseller who wanted to take advantage of this opportunity.
It's a win-win scenario, because we will also increase our visibility as a Google Apps Script solutions expert, and maybe even get some new custom Apps to develop for you and your clients.
xsMerge is the Ultimate Always-Free Merging Toolbox within Google Apps.
More details on xsMerge App here http://www.thexs.ca/xsmerge