What does Hum offer that Google Hangouts doesn't? That just about every other alternative chat offering doesn't? (Keeping in mind that all sorts of people are already segregated by many of these services, including Whatsapp and Facebook Messenger which currently doesn't support any kind of annexing.)
Also where do you place 'security' in your list of priorities in regards to Hum. ('Secure, security, encryption, encrypted' are words that do not appear on your launch page.)
In addition, every Hum user gets an email address at letshum.com that they can use for incoming email.
Which chat program do you know can send a message as an email? And receive chat messages via an email address?
It seems the idea behind this, is that it's a "persistent chat".
Send an email to someone new from your facebook chat.
Regardless, this is clearly a different product, if you want to try really hard to think it's not, that is your prerogative.
you can build it on .NET. Don't care about XP, FUCK THESE XP USERS.
This works in Chrome: http://jsfiddle.net/dandv/wT26x/1/
I think Safari has a system for this too: https://developer.apple.com/notifications/safari-push-notifi...
Firefox: https://developer.mozilla.org/en/docs/Web/API/notification
CanIUse stats: http://caniuse.com/notifications