I've been compiling a list of links that will be useful for people using Gossamer Links. If you have any to add, let me know and I'll add them to the list.
HOWTOs
Using File Columns
luna template set
Understanding the luna template set layout
More about the sidebars
Customising the paging toolbar
The luna template set globals
Overriding styles in CSS using luna.css
Colours used in the luna template set
Changing the luna template set to use faux columns
Classic style templates using CSS and the luna template set
XHTML
HTML 4.01 specification
Deprecated elements in xhtml 1.0 (elements you can use, but shouldn't)
Changes in XHTML from HTML4
XHTML 1.0 specification (don't really need to read)
HTML validator
CSS
CSS1 specification
CSS2 specification (don't really need to read, since you can't use a fair chunk of it)
CSS validator
Decent tutorial (note it uses HTML4 syntax)
Tips and tricks (part 1)
Tips and tricks (part 2)
CSS crib sheet (some things to remember)
Explorer Exposed! (a list of some common ie rendering bugs and possible solutions)
Adrian
HOWTOs
Using File Columns
luna template set
Understanding the luna template set layout
More about the sidebars
Customising the paging toolbar
The luna template set globals
Overriding styles in CSS using luna.css
Colours used in the luna template set
Changing the luna template set to use faux columns
Classic style templates using CSS and the luna template set
XHTML
HTML 4.01 specification
Deprecated elements in xhtml 1.0 (elements you can use, but shouldn't)
Changes in XHTML from HTML4
XHTML 1.0 specification (don't really need to read)
HTML validator
CSS
CSS1 specification
CSS2 specification (don't really need to read, since you can't use a fair chunk of it)
CSS validator
Decent tutorial (note it uses HTML4 syntax)
Tips and tricks (part 1)
Tips and tricks (part 2)
CSS crib sheet (some things to remember)
Explorer Exposed! (a list of some common ie rendering bugs and possible solutions)
Adrian