Answer:
I have a hundred legs, but cannot stand. I have a long neck, but no head. I cannot see. I'm neat and tidy as can be.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.
I have legs but walk not, a strong back but work not. Two good arms but reach not. A seat but sit and tarry not.
What goes further the slower it goes?
I can travel from there to here by disappearing, and here to there by reappearing.
Special abilities and brightly colored underwear are all you need to be one of these.