Good Morning stonecrop.
Thank you for your inquiries. Creating a list of all companies with a Hub Presence on AGORACOM would be a daunting and confusing task. As we speak there are over 650 Hubs active on AGORACOM, and at least a dozen new ones requested and launced each day. It is much simpler and clear to find a Hub on AGORACOM by using the search bar; and if the Hub is not present on AGORACOM you can create it by visiting http://www.agoracom.com/hub_requests/new.
As for the Preview function reseting your choice from "Question to AGORACOM" back to default, we have already forwarded your request to our technical team.
Lastly AGORACOM underwent system upgrades in an effort to improve speed and our text wrapping code. Our technical team is aware that parts of this code (which is not visible under normal circumstances) appear in your messages. They are working on eliminating this occurence and full functionality will resume in the afternoon.
Thanks again for your inquiries and your contributions within the AGORACOM community.
Regards,
AGORACOM