The ad at the bottom confused me for a sec lol. Good placement for that ad.
The design is simple and easy. Obvously gets the point across and in a simple way. I would honestly work on a new logo, something web 2.0. I know some people dont like the whole web 2.0 feel for their websites but it makes them look fresh and interesting for a new user. This is based on my opinion of course ! Besides that, its a website !
Very clean. Personally I would put info below the logo, like "Use SendMessages.org to see free text messages to various cellular providers throughout the world... etc"