This has been posted about elsewhere, but this is a pretty big deal. VR and Salesforce are very nicely integrated, as you probably already know:

http://www.salesforce.com/appexchange/detail_overview.jsp?id=a0330000000GI9FAAW

• If you already have Vertical Response, email nonprofits@verticalresponse.com to get it for free.
• If you don’t have it yet, go fill out this form and fax it to them directly. I found it at http://www.verticalresponse.com/non-profits/

More details can be found on the VR Email Marketing blog – http://blog.verticalresponse.com/verticalresponse_blog/2008/04/non-profits-ema.html, which I recommend heartily for all nonprofit communication folks out there. Janine Popick, who writes the blog, has a great writing style and gives lots of good tips around getting more people to actually read your emails.

Enjoy!