The new version addresses the criticisms some people on the newsgroup had about a non-standard RISC OS interface with improved GUI, drag and drop and other desktop complient updates.
The press release states that "SiteWriter is now far more powerful than the original release. We listened to you and have a completely new product based on your suggestions."
Given that SiteWriter is now the only WYSIWYG web design tool for RISC OS, it's great to see that DanSoft have listened to public opinion and have made improvements accordingly. You can download a demo from http://www.dansoft.co.nz/sitewriter/.