I just started exploring couchDB and ran into this problem.  I am trying to access some stuff on my newly created couchone.com database.  I just want to learn how to fetch the names of the databases I have created  using an ajax call from a client browser running on a local pc.

Using jQuery (in Firexox) in the firebug command window I run this:

test = function(){
  url = "http://withforesight.couchone.com/_all_dbs"; 
   url: url,
   dataType: 'jsonp',
   success: ( function(Response){ console.log(26, 'response is: ',                   Response) } ),
   error: function(XMLHttpRequest, textStatus, errorThrown){alert("Error"); }

I receive the following reply from the server:
HTTP/1.1 200 OK
Server: CouchDB/1.0.2 (Erlang OTP/R14B)
Date: Sun, 30 Jan 2011 22:52:29 GMT
Content-Type: text/plain;charset=utf-8
Content-Length: 55
Cache-Control: must-revalidate

In all cases I see a status code of 200OK.  (note odd content type).
(1) the success handler DOES NOT trigger.  Nothing appears in the console log. 
(2) In the NET tab I see the data has been returned both in JSON format and as an array (under the RESPONSE tab) 
(3) I see no way to access the returned data in my program.  It is not in the DOM and there is no variable I can find that contains the response data.
Now if I change the ajax dataType request to just json 
dataType: 'jsonp', to dataType'json',
(1) the success handler fires
(2) BUT  NO is data returned 
(3) and I get this in response headers
HTTP/1.1 200 OK
Server: CouchDB/1.0.2 (Erlang OTP/R14B)
Date: Sun, 30 Jan 2011 22:55:05 GMT
Content-Type: application/json
Content-Length: 55
Cache-Control: must-revalidate
I think jsonP is required because this seems to be a cross-domain request.  But either I am missing something or perhaps CouchDB is not setup to handle the callback processing required by jsonp requests. (see: http://remysharp.com/2007/10/08/what-is-jsonp/)
Any help, advice, beer appreciated....

Also, I can not find any examples or documentation for:
jquery.couch.js (the jQ plugin)  
couch.js (that ships with the couchDB installation).   
Pointers to docs/examples much appreciated.

Mike Behar