alcinnz, I'm consolidating my writing on how I'd implement Internet Communicator features for my hypothetical device. Mostly I'm combining paragraphs, but I'm also rearranging & merging some remarks I've made over the past month.
Incorporating clarifications suggested by @freakazoid (clarifying which step is FLAC's "autocorrelation", & mentioning sticking to UTC is an option).
Also I discussed autotagging emails as what sounds like a nice UI to me!
More credits to give out when I linkify...