In addition to the citation to the recent Serials Review article, there is an earlier article that compares three systems.

Also, there is a comparison of three systems at http://lester.boisestate.edu/tdnet/   That site also includes the paper that Peggy Cooper and I presented at Internet Librarian earlier this month and additional information on the product/service we chose, TDNet.  It also includes links to a number of TDNet implementations in various types of libraries.

Anyone reviewing such systems at present should also review other systems that have come on the market, such as the new Ebsco system coming out shortly and 1CATE.

dan