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I'm interested as well... When can we get our hands on the free and $99 version? I've got a bug where xdirectory appears to be conflicting with wfsection and would love to squash it.
It appears that both modules have a conflict with $orderby. I get a blank page unless I comment it out in either module.
My only concern with xdirectory and payment is really with support and maintenance of the module. Anyone else worried about the risk of having development of a non-opensource module resting with one person? What happens if they get bored, stop development, or suddenly lose interest? What about updates, functionality, etc.
Anyway, great start on a great module. Please let me know about timing. Thanks!