PopURLs - What's Hot Now

http://popurls.com/ - a great site that aggregates the most popular content from across the web.

If you're keen to stay on top of what's hot, cutting edge views and opinions, it's a very good place to start.

Also a good place for if you're looking for business ideas and opportunities based on current trends.

If this is something you're interested in, another site to look at is: http://addictomatic.com/ - another good, customisable content aggregation site, which is along similar lines to iGoogle (http://www.google.co.uk/ig or http://www.google.com/ig), and PageFlakes (http://www.pageflakes.com/).