Yahoo offer something similar to google sitemaps
http://www.ysearchblog.com/archives/000220.html
- Yahoo site maps should be named urllist.txt or can be in gz format, urllist.txt.gz
- They should reside in the root folder of your web site.
- There should be one URL Encoded URL per line.
Here is a site that will make a google site map and a yahoo urllist.txt.
http://www.xml-sitemaps.com/