Lisfeeds is described as an:-
'aggregator that scrapes feeds from librarian oriented sites from around the world. Essentailly we just repackage content from a few hundred sites and make it easy to browse and search them all in one place.'
An excellent use of a web 2.0 as this is an great RSS aggregator. Oreilly describes aggregators as follows:-
'Therefore, Web 2.0 companies set inclusive defaults for aggregating user data and building value as a side-effect of ordinary use of the application. As noted above, they build systems that get better the more people use them.'
Anyhow, try it out, i've added my link.