Activity on all the leading online data visualization sites appears to have plateaued.

Data360 has received no new data contributions in several months. The site is currently under a comment spam attack which they seem unable to repel.

Swivel is entirely focused on their private service for business customers. Almost all the new activity on swivel.com over the last couple of weeks has been in the form of data contributions by a single customer.

GraphWise has gone nowhere since their launch last year.

Many Eyes continues to get steady user traffic and new contributions, but commenting activity is down.

These sites have huge potential for encouraging online collaboration, but that potential has not been realized yet. What’s missing?