BuxtonTheRed

Hop the country, surely?

Part Jetsons, part Wallace & Gromit.

This is already a solved problem from a technology standpoint. Use a Jabber (XMPP) client which supports OTR ("Off The Record") encryption.

To avoid (or at least, massively complicate) the collection of metadata against you when doing that, do it over Tor. Jabber servers can be run as a Tor Hidden Service.

For aggressive local security, boot in to TAILS (Linux live-boot environment optimised for Tor and security) and do your secret comms in there.

I can foresee that any sort of effective central blacklist provider for darkmail will be "Black Warranted" (coerced by super-sekrit NSA/GCHQ/etc. orders) in to listing desirable targets in order to try to deny them use of the system.

I would suggest that at least a little bit of thought be given to this issue though. Maybe allow a recipient server to specify the number of PBKDF2 rounds that have to be applied to the hash of the message, as a proof-of-work / rate-limit thing? (So if I don't care much, 10 rounds. If I'm sick of spam, 10,000. Or whatever. But let the recipient choose.)

I'm tipping my hand slightly here, but the people who really need this stuff genuinely find GPG a massive pain to deal with - and the proliferation of "live-only" messaging solutions (Silent Circle's Silent Text, and OTR-over-jabber-over-TOR) are a pain compared to an "email" asynchronous workflow.

Do you find it hard to switch off when watching other entertainment content with VFX in, or are you always looking for the "seam" between in-camera things and the stuff that's been added in?

(Also, that showreel is great. We loved season 2 of TMitHC and the amazing work you put in on it really made it believable.)