You must have heard that the Nook and the Kindle, two of the world’s best-selling e-readers, have dropped their prices to below $200 — down to $149 for the Wi-Fi Nook and $189 for the Kindle . It’s bad news for e-readers that recently placed themselves at low price points to compensate for fewer features (like the Kobo I just reviewed), but of course good news for everyone planning on buying an e-reader soon

As you’ve undoubtedly heard by now, iOS 4 is out and spreading across iPhones like wildfire. With it, comes the ability for third-party apps to run certain tasks in the background.

When we first wrote about BarMax in January, there was a lot of interest in the iPhone app for one obvious reason: it cost $999.99 . While it may not have been the first $1,000 app (the useless gimmick app, I Am Rich, can claim that title), it was the first to seemingly be worth the high price tag. Apparently, users have agreed.

These are the stories that make my job worth all the hassle and stress. Two guys create a company called Precision Polling that allows quick and easy phone polls.

As Facebook continues to experiment with its universal virtual currency, Credits, some developers continue to tell us that the product is going to lose them money — even as others say the opposite. One issue is the flat 30% fee that Facebook takes from all Credits transactions on third party applications. But there other potential costs, that some in the industry say increases the total percentage to around 50% of their revenue, versus what they are bringing in now.

Both CNN Money and MarketWatch have added curated stock and finance tweets to their sites. But they aren’t just showing unfiltered tweets based on a query or hash tag – instead they’ve turned to StockTwits , presumably for more relevant data. Messages only show up on StockTwits if you add a “$” before a stock symbol, and the company also carefully moderates messages and blocks users who tend to spam.

Location-based gaming startup SCVNGR is continuing to flesh out its Foursquare competitor . Today, the service is launching online profile pages, giving users the ability to showcase all of the challenges they’ve completed, as well as the associated photos and tips to other players

Here’s an interesting Forbes video with Chris Sacca, ex-Google backer of Twitter, Gowalla and Swipely on the future of social networking and social commerce… Top takeout People will do more real stuff with social nets….

Earlier today, Barnes & Noble announced a new WiFi-only Nook eReader at $149, and that it was slashing the price of its 3G version to $199. Amazon had to answer. And it just did.

A mobile app that doesn’t take advantage of your location information is becoming a rare breed. But developers must create different geo apps for each different phone—Android, iPhone, Blackberry, you name it. And that ignores all of the dumb phone out there (sorry, feature phones).