I also have been dropped from Yahoo! I have an affiliate site for contact lenses. After reviewing the guidelines I have made several adjustments to my site. Will Yahoo! accept me if the site once again fits their criteria, or do I have to beg someone to be resubmitted. I'm still being spidered on a regular basis.
What is frustrating is not knowing why I was dropped. In general, I try to provide quality content, including a shopping comparison feature. If you look at the guidelines a good portion of web sites that practise
SEO would violate some terms to some extent.
When I hear about people being dropped for months on end I wonder if it doesn't make more sense to just launch a whole new web site.