Just a quick note... my husband normally posts on here, but this site is of particular interest to me. In our non-SUN life, I am a Director of Development and Programs for a small foundation. My organization awards grants, but seeks outside funding for our educational programs and regularly forwards outside grant opportunities onto our 40+ grantees.
Here is my critque - take it for what it`s worth. I really think you have a great idea that grantseekers could really use - it just needs a few tweaks.
I absolutely think you have a great concept, but was frustrated by how long it took me to find your actual services and their costs. To sign up for your alerts, I had to go to the main page, click on "Our Services", and finally find the nearly hidden link for signing up for your free services. The same with finding out costs for services, which were hidden in FAQs. And I never would have thought to do grant searches under your "About Us" section.
To be blunt, you would have lost me after the first page. I was looking for an "action" item on the main page. For me, grant searches usually happen while I`m on a long conference call or running between meetings So I need to know what you do quickly and determine if it`s worthwhile for me to take the time to sign up and ultimately pay for your services and/or refer on to our grantees.
I absolutely think you have a great concept, but you may want to reconsider layout and flow of your site. Depending on the quality of information you send out, $30-$100 per year would be very worth it to me to sign up for... and I probably would pay more if the information is really good. You may also want to further define the types of grants that will appear in your searches (ie private, federal, state, etc.)
Separately, you may want to add the Foundation Center
http://foundationcenter.org/ under your Free Resources link. It is my go to site for a large part of my research. Btw, I love the "For Grantmakers" section, although I would make the picture a link. Right after reviewing your services, I clicked on this section to see if my organization is listed. :)
Best of luck. I think you have a great concept that would be highly marketable with some minor tweaks.