A couple of thoughts:
The red background doesn't work for me. It's too rich a colour, both distracting and somehow inappropriate in my view. What's wrong with white?
The donate button should be a contrasting colour.
You should probably invest in a logo. The typeface of your site name looks a bit dated. If you have a clear idea of what you want, you could try to get a designer on fiverr.com to make one. Otherwise try to find a designer who will create an original logo, perhaps on a pro bono basis, or in exchange for a link from your site. You could try to find one Twitter?
Centred text looks amateurish. Set it left.
Watch your spelling. eg http://www.rfahaiti.org/2011/12/new-house/ (it's successful).
On the above page, use the images bigger and move at least one of them to the top of the page so readers are not just looking at a slab of text.
Hope this is useful. If you want to critique back, this is my WordPress site: [link moderated - if you want to show your site off, please start your own topic in 'Your WordPress']