I have about 30 blogspot blogs. Some are new and some are already 9 month old. Since my colleague was taking care of the sites, I did not pay much attention to these blogs. However, last night I found that nearly half of the blogs, includeing some 9-month old one, are not indexed on Yahoo. They are being indexed quite well on Google. Yahoo search is more popular in my place so I think it is more important to be indexed on Yahoo. My colleague constantly updates these blogs with original contents and she also constantly builds backlinks (though quite slowly) to these blogs. I don't see anything that can violate the search engine rules. Now, I am thinking of: 1. The templates chosen affect Yahoo indexing process even for the 9-month-old blogs (We only use built-in templates on blogger.com) 2. Adsense (not sure about this issue, but we have other sites which are using the same adsense account and they are indexed and raking well both on G and Y) 3. Y! version of sandbox??? (even for 9 months) I wonder if other here also have such problems?