Why should I trust these guys with my data? It's bad enough that Google knows so much about me... but at least they have some checks and balances built in. What sort of safety does "greplin" have to offer adopters?
We're also working with a) encrypted indexes b) only writing the index to disk rather then any content. this shuts down a lot of neat features (generating snippets etc.) - but users that are willing to forgo features for added security might find it useful.
Not a worry so much as a harder problem that sometimes doesn't get considered.
I'm interested in talking to you about integration. I can't use the contact form on your website because every page now sends me to the "Thanks for signing up" page and, unfortunately, you don't have an email address in your profile. Can you (or somebody appropriate :) shoot me an email (address in my profile)?