Wow! Great research, I stand corrected. How does one get ahold of Lexis-Nexis? (cheap)
I'm glad you asked. Lexis-Nexis is breathtakingly expensive, so unless you are Knight-Ridder, you won't be able to afford it.
The Lexis-Nexis search pay by credit card feature, however, is free. You only pay if you purchase the articles. Thus you can do research such as I performed comparing the number of articles associated with a particular keyword, and find out what those articles are. You can likely go to the original news source web site to get the archived article free or cheaply.
Unfortunately, if there are greater than 1,000 articles Lexis-Nexis will only report that there are too many articles to compile. You don't know if there are 1,001 or 20,001 out there. For example, I put in the search term "Kos", figuring that would capture articles relating to "Daily Kos". There were more than 1,000, but I have no idea how many.