WEbook has started its AgentInbox web service to connect writers with agents. The basic process is:

• A writer submits a query letter, synopsis and book chapters, as required by the agent.
  
• AgentInbox editors verify that the submission formally meets the agent's requirements.
• AgentInbox forwards the submission material to the agent (without comment on its quality), or returns it to the writer for formal correction.
• If the work is forwarded to the agent, the writer and agent communicate directly, as if they'd connected conventionally.

AgentInbox is a beta service and is currently gratis. They have quite a few noted agents signed up and one landed writer/agent contract as of the time of posting. Some of the agencies represented by the thirty or so participating agents include Jill Grinberg Literary Management, Writers House, Sanford J. Greenburger Associates, the Ethan Ellenberg Literary Agency, and others.

Here are two articles that review AgentInbox:

• Writer Beware's review of AgentInbox (generally positive, noting its start-up status, and related attempts by others)
• Publishers Weekly's news of AgentInbox

Since I was unfamiliar with WEbook, it took me awhile to realized that WEbook's author community and AgentInbox were completely separate services. WEbook gives authors a place to review each others' manuscripts; completed/polished stories may be voted on and published by WEbook. Most commentators consider WEbook a form of self-publishing.