The full user guide and API Docs can be viewed here.
Bug Reports and contributions
Don't post bug reports here - use the issue tracker on GitHub: https://github.com/woothemes/woocommerce/issues
Feature requests should be posted on the ideas board here.
If you do need support, before posting check the WooCommerce > System Status page. This can often reveal errors which you may not know about.
We'll occasionally stop by here, but your much more likely to get support via support.woothemes.com
WooCommerce is open source so any support is welcome from the community :) Be it spreading the word, contributing to core, or just helping other users; your support is much appreciated.
Please remember to rate WooCommerce if you like it, and also click the 'works' button on the plugin page to report WC working with your versions.
And if you do click the 'broken' button let us know why its broken so we can help you and others.
Thanks and I hope you enjoy working with WooCommerce!