Funny. I had not noticed that until you pointed it out. That seems to be a status given to people who reach a certain post level. On our site the values are set to:
1. Newbie = 0
2. Jr. Member = 50
3. Full Member = 100
4. Sr. Member = 250
5. Hero Member = 500
We currenly have 4 members at Hero level and 1 at Sr. Member.