I'm working on a wp site with the woo/bitcoin plugin.
http://wordpress.org/plugins/bitcoin-payments-for-woocommerce/
 The plugin uses electrum wallet
"Electrum wallet payment option completely removes dependency on any third party service and middlemen."
The only major issue I've ran into so far is you have to set your woocommerce default currency to
dollars (haven't test other currencies). So your shop/cart will show dollar prices but when
you go to pay with the bitcoin option it'll convert it for you. If you set the default currency to show bitcoin
no conversion will take place and it'll show zeros for total. It appears the plugin isn't
detecting the btc as a default currency option.