Web sites

Museums, Galleries and Digitisation - Current best practice and recommendations on measuring impact	Information from the Scottish Museums Council. Well written and useful. If you don't do anything else then read the recommendations on page 7 of the summary report. Although designed for web projects the advice is spookily similar to my documents about gallery exhibits - which is nice.
Good practice guide for developers of cultural heritage web services	This is a huge resource aimed at those developing on line "collections style" web sites. There's lots of good stuff here but I found it all a bit unfocused - it doesn't really address why you would want to develop a site like this and why visitors would want to use it.
Research based web design and usability guidelines from the US government	Once you've got past the pdf file format these are surprisingly well written guidelines on making web sites usable and accessible.