I have been getting a lot of spam lately advertising sites hosted on geocities in various countries. For some reason spamcop's parser usually doesn't pick up on these. I've been reporting them manually, since Yahoo will address the problem and discontinue the sites when it gets a report, but it would be nice to be able to do it via one step with Spamcop. The extra 24 hours it might take for a report to be received is money in the bank for the spammer.
The other issue is when instead of a site being advertised, the email advises people to contact an email address. The parser doesn't find those, but again, geocities will terminate their accounts if they get the report.