I don't know of any generally available Web site with this information. We will be adding coverage of SSPs to our subscription database (http://www.evaluatorgroup.com/) in the next month but that doesn't help you now.
Editor's note: Joe, try taking a look at our sister site, searchxSP, at http://searchxsp.techtarget.com/. It's loaded with SSP information that I'm sure you will find helpful. Also, here' a link from searchxSP listing vendors who fall under the category "Service Provider: Storage Service Provider (SSP)" http://searchxsp.techtarget.com/buyersGuideBrowseCategory/0,289637,sid28_tax286764_pag1_typcat_srtE,00.html. Also, searchStorage's Best Web Links category, Managed Storage, has a wealth of SSP information http://searchstorage.techtarget.com/bestWebLinks/0,289521,sid5_tax281560,00.html.
This was first published in May 2001