Just release Entry API:
Entry API is a module that creates a XMLRPC/SOAP server under the hood of the ExpressionEngine CMS. With this module you are capable to insert, update and delete entries with a SOAP or XMLRPC call. It support the default fields aswell custom fields. So you can for example insert entries from within an other application like a Iphone app or a other web app.
http://devot-ee.com/add-ons/entry-api