I would appreciate it if the spam-filter could be expanded with wild-cards and <search-query>.

e.g. filtering on <term>*<term> or <term><search-query><term>

This could filter out much more spam-results.

Two other nice additions would be:

Filter hosts who provide more than x-results for a search, and for which the search results meet certain criteria.
E.g. many spam-results show the same source, for <search-query> but with just another extensions.

Filter results based on private ip. Quite a lot search queries come back with a private IP as a source. While technically possible, most of the times, these results are quite useless. Would be nice to filter these out as well. (Shareaza does this by default I think).