Tobias Schlitt has a new post today concerning the improvements that's been made to the PEAR::Services_Trackback package.

I finally found some time and improved the trackback handling on PEARWeb:

• HTML entities in trackbacks are now decoded before using the bad-word-filter (and the list has been updated)
• Only 3 trackbacks per 30 minutes will be accepted from a host from now.
• If both of these criteria do not match, it uses DNSBL and SURBL mechanisms to check trackbacks additionally.

He comments on how it will work now with these improvements and the popularity that the package is garnering...