bill - 6:44 am on Dec 6, 2006 (gmt 0)
Entire systems like that are the work of custom programming and private development. I don't think you'll have much luck finding a pre-made system like that to create an entire directory. You could however look into integrating a CMS with some other database tools to create something similar. Most CMS systems have feed aggregator modules included in them nowadays, so that's a start.