I know it's got less of a "cool" factor because it wasn't invented last week, but I soooo wish everyone would just use IRC. Use irccloud if you want some nice apps and picture embedding.
IRC was designed by hackers, for hackers and it shows. Twenty years ago, IRC was my talk destination of choice and I operated a server within a major IRC network; these days my startup uses Slack which I determined to be the "least irritating" of the 21st century options.
I had high hopes for Google Wave but it was sadly stillborn.
Most would probably prefer a web ui, with search -- but recording chat could still be done via a bot.
I wouldn't say you could get most of the whole slack experience with just IRC, and you'd probably have to do some work (if only configuring channels/bots/find a web ui etc).
Yeah me too. Google really effed that one up. RIP
But it's not possible to get what you're asking without breaking the IRC protocol - it's not easily extended and the formatting rules are icky mIRC crap.
Perhaps IRCCloud could be sold as a rebranded Enterprise app as an alternative to Slack? I'd love to see some competition as it looks like only HipChat and Slack are getting talked about.