The package is offered "as-is" without any warranty or
commitment to support. However, informal advice and help is available
via the PEAR user mailing list and XML-RPC.com.
For more general XML-RPC questions, there is a Yahoo! Groups XML-RPC mailing
list.
The XML-RPC.com
discussion group is a useful place to get help with using
XML-RPC. This group is also gatewayed into the Yahoo! Groups
mailing list.
The Jellyfish Book
Together with Simon St.Laurent and Joe Johnston, Edd Dumbill wrote a
book on XML-RPC for O'Reilly and Associates on XML-RPC. It features a
rather fetching jellyfish on the cover.
Edd is responsible for the chapter on PHP, which includes a worked
example of creating a forum server, and hooking it up the O'Reilly's
Meerkat service
in order to allow commenting on news stories from around the Web.
If you've benefitted from the effort he has put into writing this
software, then please consider buying the book!