I'm seeking suggestions for services that provide for online registration of PTO members. Our PTO currently uses a service that is not well suited for the information that we typically seek from our members as part of the registration process. Although we have been successful in registering a large number of families online (and thus have significantly reduced the number of hard copy registration forms), we have had to sort through a number of issues with the online registration process.

Thank you in advance for any suggestions you might have.

Sounds like you're looking for PTO Manager software:

http://www.ptotoday.com/manager/

Tim