Sample (reference) Web Service implementation

Hello,

Are there out-of-the-box published Web services for a typical CRM type of a SAP implementation?

Also, are there reference Web Services published at a publicly accessible URL that I can use to obtain WDSL and test out calling SAP published Web Services?

Thanks

PS : I tried to browse the directory at "UDDI@SAP Registry" to locate such a published site. But every time I did a search I got an error with the message: "A system exception occured in the UDDI@SAP R/3 Backend system".