I'll go ALL IN when spreadcoin gets its encrypted in-wallet messaging system. I WANT IT SO MUCH!
Oh? I'd be interested in your use case, i.e. why?
fwiw, I'm playing around with an experimental Spreadcoin wallet with some additions: gussied-up icons, Bellacoin's diff history chart, Banksycoin's in-wallet IRC and [Talk|Chat]coin's encrypted messaging (the latter working only on testnet thus far).
As with the in-wallet block explorer, the in-wallet chat is accessed via menu (the penultimate item: "Chat Window")

and presented in a separate window:

leading to the (by now fairly standard) in-wallet IRC messaging:

I originally submitted an exploratory PR, adding Bella's difficulty chart to the overview page, Mr Spread thought it'd be better placed on the mining page, here's the candidate:

Alert readers will have noted the appearance of a Trade option, again adapted from an existing in-wallet trading implementation. It's fairly primitive, limited to Bittrex and I haven't had chance to check its functioning as yet but now that SPR is listed on BIttrex, it seems to be working largely as expected:

Finally, an adoption of the Talkcoin/Chatcoin encrypted in-wallet messaging ---
very early days for this, I've only just decanted the code and it only works on the testnet atm:

It's important to note that these are merely suck it and see experiments with no particular ambition to be included in an official release (whatever that might be in a p2p context), largely because so many of these nice ideas ultimately prove to be more trouble than they're worth and there's no substitute for actually getting your hands dirty and having a go at finding out.
Neither the Trade tab nor the in-wallet encrypted messaging is yet fit to be seen in public so they remain unpublished for the time being ... but gussied-up icons, a diffplot and an IRC chat window are basically just cosmetic (a fork is not required) so if you fancy joining in with the experiment, you can check out and compile the cpuminer1.2.trial branch:
https://github.com/gjhiggins/spreadcoin/tree/cpuminer1.2.trialCheers
Graham
Edit: not last, penultimate