According to the Microsoft sharepoint blog the SharePoint Designer is available as a free download!
quote of their blogpost:
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Today we are excited to share with you some news about SharePoint Designer 2007. Starting now (April 2, 2009), SharePoint Designer 2007 will be available as a free download! We want more of you customizing SharePoint and feel that this a good way to put the tool in the hands of more people. You can find a lot more information in our site including:
a) Letter to our Customers
b) Frequently Asked Questions
c) Free Download
Also, make sure to watch this YouTube video where Tom Rizzo and J.R. Arredondo discuss these changes and provide some insights into what is coming in the future. Or if you prefer to download the video, just pick the appropriate version for your bandwidth in the list below:
· Small size video (6MB)
· Medium size video (17 MB)
· Large size video (83 MB)
Regards,
The SharePoint Designer Team