I don't understand why Whatsapp don't have an online offering for the computer. I prefer to "text" off my computer if I am working there all day. With a decent

I don't understand why Whatsapp don't have an online offering for the computer. I prefer to "text" off my computer if I am working there all day. With a decent input device, I think people who spend any length of time on a computer during the day. I think whatsapp would really benefit from a web offering. Also as an aside to this, I presume whatsapp does not allow just anyone to connect via XMPP, what would be much better again, would be if my IM account could connect to whatsapp.