They don't really mean anything. When your post count gets to a certain level, you move up to the next level of membership, but it doesn't confer any extra benefits, save a little respect. Higher post count generally means the member is more active. Occasionally, a senior member will offer stuff for sale and either open it up only to Sr. Members and above or offer a discount to other senior members, but that's about the extent of the the privilige.
You've probably noticed you're no longer a
. The levels are:
- 1-99 posts
Jr. Member - 100-499
Full member - 500-999
Senior Member - 1,000 - 1,999
Resident - 2,000 - 9,999
Permanent Resident - 10,000 - ?
If you go the Members page, accessible from the blue links bar and then sort by post count (just click "Posts"), you can see the progression for yourself.