Eager of the news that Sprint would be rolling out Mango for the HTC Arrive today, the first thing I did was plug in my phone and bring up Zune. Much to my dismay, both Zune and my Arrive reported that I was fully updated at version 7.0.
I decided to ping Sprint on this by logging a chat session with them and was told that though the update starts getting pushed out today it may take 2-3 days before I actually get the notification. The reason is that this is a system-generated update that gets pushed out in waves over a period of time. So if you, like me, are feeling antsy because you can't update your Arrive, just be patient.
I know, I know, I want it now too.