How do I manage my last days with my company?

I work for a small company of 12 and have around a week left of my month notice period (I live in the UK so six weeks is a little long!). I am moving to take up a project manager post. The job is a big step up for me and I am very excited at the prospect. All my colleagues have been wonderfully supportive and eased my departure.

I would not have been looking for another job were it not for my MD's total lack of communication both on a day to day basis and long term, often promising me projects and promotions that she never kept and her general lack of managerial skills. Since submitting my resignation I have not heard one word from her (I work off-site). I have been a model employee and in my last appraisal 'a great asset to the company'. I know I have a good reference as it is being done by my line manager who also told me that I will be 'greatly missed'.

With a week to go I wonder how I should approach this. Should I make an approach, send a letter or card or simply leave without comment?

This is my first post and would be grateful for any thoughts and suggestions.

Gary