If you have questions about IFEFFIT or XAFS in general, please send email to <ifeffit AT SPAMFREE millenia DOT cars DOT aps DOT anl DOT gov>
This is a Mailing List that you can join. It also has a public archive that you can browse.
For development issues, programming with IFEFFIT and related codes, there is an ifeffit-devel list at Ifeffit Devel Mailing List. It also has a public archive.