OK, we'll add SHA512 marker.
Open file location button is already planned. Timestamp... hmmm, what's the use-case for this feature?
Initial rulespack is already completely editable, I'll announce RulesManager separately in a couple of days I think. It's really powerful, but not so nice and pretty and not so stable, that's why we haven't included it in a default build.
Google safe browsing - you mean that red window popping-up and scaring users that this site serves malware?
Ogh, it's a funny story actually. Well, "funny" also depends on your point of view. Anyway at first they didn't like ReHIPS setup. Have no idea why actually, it's served through https, certificate is OK, it's signed with a valid signature, no protectors, packers, whatsoever, no AV detections, compiler and installer are also standard and wide-spread. I decided it's not good and tried to fix it via google webmaster tools. Now the whole forum and site are banned as their crawler found links to the setup. I'm afraid to fix it further, maybe they'll ban the whole server

In other words we're working on it, but google is google. I never had any hard feelings towards it. But when you face this and don't have many options what to do and there is no adequate support, it's hard to remain unbiased.