A couple of friends of mine have just launched a new blog called at Cisconews.co.uk.
The guys who run the blog are all Cisco qualified and also busy working on furthering their certifications. The site is worth a look, with some good custom written content as well as syndicated news from various other resources.
Hopefully we will see some Cisco Certification resources on the site in the not to distant future.
Cisco WAAS seems good enough if you only have a few sites