Software to schedule social media updates?

[j.arcin]

I know someone who works at a company and they have a software that I am very interested in but have no idea what its called. You enter a post and schedule an end date and time intervals (every 2 hours, every 7 hours, etc.) Then what it does is it sends out your post as a twitter, facebook status, and myspace bulletin for those intervals until the end date. Does anyone know what program this is? Or a similar program that can do the same?

[Metapilot]

These are the main ones that I know of:
http://socialblaster.com/
http://sendible.com/
http://hootsuite.com/