You can contact Ix Forres ingame or via the IRC instant messaging service (irc.coldfront.net #eve-isksense).
You can also contact support@isksense.com to get in touch with the admin team.
If you wish to discuss ISKsense, please use the ingame mailing list 'isksense-users', where users of ISKsense can chat and discuss marketing strategies and best uses of ISKsense.