this bundle implements the icecat api as described here http://icecat.co.uk/en/menu/channelpartners/index.htm by using great guzzle/guzzle webservice description, leading to a cool restful interface.
to "talk" with ebay you'll need to set following parameters in your parameters.yml
icecat_user: [YOUR_ICECAT_USER]
icecat_pass: [YOUR_ICECAT_PASS]
icecat_url: [YOUR_ICECAT_URL]
icecat_lang: [LANGUAGE]