3 sites to keep in touch with new startup/business ideas

Springwise - the 200 lb gorilla
Springwise.com, a Singapore based website, is the undisputed leader in the business idea/startup ideas arena. Every day the site profiles 3-5 new business ideas, all found through their network of 'spotters'. The site seems to have a bias towards creators/sellers of physical goods, with a further bias towards eco-friendly ideas. A quick search for 'springwise' in my gmail brings up some of my favorites from the past couple of years:
Crowdfunding platform for web and mobile startups

Thermoelectric wellies charge festival-goers’ phones

Shimano kit converts regular bikes into e-bikes


KillerStartups - best read via RSS
KillerStartups.com reviews 15+ startups per working day and visitors to the site can +Vote the ideas they like. Despite the low-end look of the website, its surprisingly difficult to get featured. I got a previous startup featured once before but the 'review' totally misinterpreted the business, so much so that I couldn't even publicize the review on Twitter etc. as I feared I'd mislead people.

KillerStartups also operate the Startups.com daily deals site and boy do they let you know about it! Moving advertisements for it everywhere! It's definitely a site that's best consumed via RSS! Here's a couple I remember reading before, with the 2nd one purely for amusement:

SatTracx.com - Locate Your Mobile Wherever It Is

In20Years.com - This Is You In 20 Years

PennOlson.com - a well-executed Asia based site
Combining news reported and coverage of new startups, ideas and concepts, the Penn-Olson.com is a great way to keep in touch with the Asian Startup scene. At 500,000 page views per month, the site has considerable power to drive traffic to your site. A recent favorite of mine (if only I had an iPad!):

7notes Converts Your Handwritten iPad Notes