Websites if they dont solve the purpose of its existence, however good they are - not useful is like having no website.
Specially with cause-based websites- They have to be strong enough to
-capture once attention
-give a complete understanding of the work
-sensitize them to engage in the work
WarChild: This website has a strong message to pass on, specially as it is dealing with internationally war hit children.
It carries every statistic details, problems and most important the solutions where you can also engage yourself.
I like the way it is done.
link to the website of WarChild: http://www.warchild.org.uk/
enjoy and get inspired!