Awesome idea, I'll be watching this like a hawk.
Here's a little supplemental info, if you don't mind:
The top 5 max bids from YSM on "email marketing" as a keyword are...
#1 Email Marketing
Reach customers with professional-looking emails - 60-day free trial.
www.constantcontact.com
(Advertiser's Max Bid: $6.20)
#2 ResultsMail E-mail Marketing
Easily create e-mail marketing campaigns, newsletters and promotions, manage large contact lists, distribute to thousands in seconds and instantly see who opened and who clicked on a link.
www.resultsmail.com
(Advertiser's Max Bid: $4.25)
#3 Sage CRM and SageCRM.com
Award-winning CRM solutions for sales, marketing and customer care automation, and access to vital customer information – anytime. E-mail marketing.
na.sagecrm.com
(Advertiser's Max Bid: $2.55)
#4 E-Mail Marketing and Advertising Online
Stun. - e-mail marketing solution that reaches the inbox, gives you the ability to send wireless text messages to any mobile phone, broadcast voicemail and calls to any telephone, and more.
www.stun1.com
(Advertiser's Max Bid: $2.51)
#5 Compare Email Marketing Services - Free
Let email marketing companies compete for your business. Submit a simple request and get quotes from up to 5 companies. It's free, easy to use, and there are no obligations.
www.supplier-match.com
(Advertiser's Max Bid: $2.50)
Also, according to YSM, "email marketing"(alone) was searched 160,330 times in June.
Best of luck to you, portal. If you feel like taking on a partner in this, let me know.