The Congressional Research Service (CRS) is a service of the Library of Congress that generates a variety of documents for Members of Congress. Usually, the documents are fairly brief and are produced quickly on topics that are very current (for instance, an analysis of the potential implications of a court ruling or a review of published research on an issue raised by news events or by a proposed bill).
Sadly, documents by CRS are not released to the public or made avaible to the public by CRS directly (this is in contrast with other government agencies the specialize in policy and legal research and analysis). However, if recipients of the reports release the documents to advocacy groups, libraries, and other places, there are several places on the Internet that make CRS reports available. Oddly enough, the State Department itself makes some CRS reports available (so... that means a federal agency that doesn't make its reports available to the public finds them being released by another federal agency...hmmm).
Here are just a few places where you can search for CRS reports on Haiti. I see at least two reports, as of today, that deal with Haiti since the earthquake.