Links to Zimbra.com site from "zimbra app" site

[andersjj]

I'm working on an application that would link to Zimbra's collaboration suite via API calls. I'm going to have a site for this hosted product. I was wondering if there were any guidelines as to what can and can't be used from another site. Can the Zimbra logo be used at all? Are there preferrred links or links that shouldn't be used? I've seen the badges, but aside from that, I haven't seen many guidelines in terms of what kinds of images, etc. that could be used from the Zimbra site.