What are the most important guidelines for usability, accessibility and SEO?

Question

Can someone tell me about the most important usage, accessibility and SEO rules to consider when designing a good Web2.0 website?

Answer 1

http://www.w3.org/WAI/
http://www.section508.gov/index.cfm?FuseAction=content&ID=12#Web
http://www.google.com/support/webmasters/bin/topic.py?topic=8522

Do not get hung up on the word "Web 2.0". Accessibility standards have been around for a long time and are an important part of any website.

Answer 2

SEO-: URL-, URL- , . .

Apache , mod_rewrite, IIS .

:

http://yourdomain.com/cgi-bin/getproduct.pl?id=12345

-

http://yourdomain.com/products/12345

( URL- ), .

Answer 3

, .

:

• 30 ,
• 12 -
• 10 -/
• 10

"" , - .