We're just in the process of finalizing the new website expected to be ready
within the next few days for "ContactGenie DataPorter 2.0"  which will
provide you with the capabilities to update existing contacts AND add new
fields (plus a whole lot more). If you're not using a custom form and want
the data format/type to be something other then a "text field" for
user-defined fields - contact me directly and I'll tell you exactly how you
can do that. I don't believe there is any other 3rd party product available
that has the feature set we're about to release.

If you subscribe to our newsletter via our current website - you'll be
automatically advised of when that goes live.

Karl