Web design and management

We are looking for someone to provide ongoing support for our website and to suggest improvements. We have an existing simple website that we cannot edit or manage. We are happy with it graphically, but want to be able to do simple editing ourselves, such as updating a blog, putting new offers on the site. We also want integrate with Twitter and facebook (eg put a Facebook LikeBox on the page). Very important that we can make frequent updates easily to keep it fresh. Before bidding please look at the existing website for Emporio Sao Paulo, our cafe in Parsons Green and also please look at My Coffee Shop, a coffee shop in Enfield, London, which we think has some great ideas we would like to emulate.