Opportunity's first 90 days on Mars in special issue of Science magazine
The latest issue of Science magazine is devoted to Opportunity's first 90 days on Mars, when it did the big liquid water flowing in the past discovery thing.
http://www.news.cornell.edu/releases/Dec04/Science.Mars.deb.html
They also did a special on Spirit back in August. These are the first peer-reviewed papers on the rovers.