They were acquired by google 5 months into it [1] and after that I remember seeing the signs in Crate and Barrels for a while, then google shut them down after dwindling usage [2]. I always thought it was a cool idea.
This was all pre-slack and the focus was physical locations vs. other tech founders so will be interested to see if now is the right time vs. then. I've certainly noticed more and more companies relying on text to stay in touch with me from a comms standpoint (HealthIQ comes to mind from recent interactions, but even our doggie day care primarily communicates with me via text now).
[0] https://www.crunchbase.com/organization/talkbin [1] https://techcrunch.com/2011/04/25/google-acquires-talkbin-a-... [2] https://techcrunch.com/2014/06/28/google-shuts-down-talkbin-...