I know that waiting can be hard. If you go to www.sprint.com/htcone you can sign up for notifications regardign the HTC One.
Sprint Social Care Team
Correct, March sometime is when we will probably see carriers getting/offering it. Probably see presale offers a couple weeks prior to actual launch.
I can understand your anticipation about the phone as it looks great. We still haven't announced an official date yet but that news will be coming soon. You can keep an eye out at newroom.sprint.com for future announcements about the phone.
Sprint Social Care
This is really great news Since that blackberry Z10 is taking forever I can get this http://thesprintcult.com/2013/02/the-sprint-htc-on