The Motley Fool's CAPS investing service is one of the newest additions to the investing community at, and it's another great way for investors to work together to beat the market. One of the features in CAPS allows users to set up a blog to talk about their picks, investing strategy, market view, or their favorite baseball team (if they so desire).

I've scoured through the CAPS blog universe to bring you a generous helping of the top blog posts of the past week.

Why RIMM's glory days are coming to an end
Though CAPS player EV38 has already tagged Google (NASDAQ:GOOG) and Apple as stocks he thinks will underperform the market because of their high valuations, Research In Motion (NASDAQ:RIMM) has avoided his red thumb. Until now. In his blog post, EV38 reveals what he believes will be a catalyst for the Blackberry maker's stock to take a hurtin'. I'll even give you a hint -- it has to do with Apple, and it rhymes with "byfone."

Five accounts you need
Are you trying to get your finances organized? Have you taken a look at the high-yield savings accounts from ING Group and HSBC? Do you find yourself carrying around a MasterCard (NYSE:MA) with no rewards program? Take a look at the recent blog post from CAPS All-Star rvanzo. In the post, he walks through the five accounts he believes everyone should have -- as well as four he thinks should be avoided.

If rvanzo manages to whet your appetite for getting your finances in order, you may also want to take a gander at what the folks over at our Motley Fool Green Light service have to share.

Mr. Hyped Technologies
TheGarcipian comes through with a blog post spurred by the recent outperformance by Hybrid Technologies, a stock he is bearish on. Hybrid Technologies is a bulletin board stock and development-stage company that is working on alternative energy vehicles -- specifically, lithium-powered cars.

In the post, TheGarcipian takes a look at the economics of the current generation of hybrid cars, such as Toyota's Prius. Though many people buy hybrids in an attempt to help the environment, those who are thinking about picking one up in an attempt to save at the gas pump may also be very interested in his conclusion.

Research Frontiers
Though Research Frontiers (NASDAQ:REFR) has been around for more than 40 years and holds a fairly sizeable patent portfolio, it has yet to figure out how to run profitably. Of course, profitability is difficult when you pay your chairman and president combined cash salaries of more than $700,000 and make less than $200,000 in revenue.

In a blog post, Mactalon reveals how turning over some stones on CAPS made Research Frontier's stock seem about as enticing as me in a sundress. Let's just say it's not a pretty picture.

Giving up on the auto industry
CAPS investor Billddrummer is done with the auto industry. In his latest blog post, he talks about how he has given up on a bullish call on GM (NYSE:GM). According to Bill, GM and fellow U.S. automaker Ford are just not having any success making money in their primary business of making cars. For GM, the result has been lousy financial performance and the need to sell off more attractive divisions like GMAC.

As weiwentg points out in his post, Stock Advisor pick Healthways (NASDAQ:HWAY) is a five-star stock on CAPS. In fact, of 253 CAPS players who have rated the stock, only four have picked it to underperform. While he admits that he's not ready to bet against the stock, weiwentg gives a rundown of why he is not among the many Healthways bulls out there.

My Live Nation Shame
There are some technologies that will allow you to "unsend" that email about your rowdy weekend that accidentally got sent to your boss. But sometimes what goes out into the World Wide Wilderness just can't be pulled back. For the king of Foolish video, TMFHollywoodDan, this was the case for a video that he posted pitching the merits of Live Nation (NYSE:LYV). In his blog, Dan talks about why he would like to hit that "unsend" button on his Live Nation video.

So now it's your turn -- get off the sidelines, join CAPS, and start up your own CAPS blog to share your own knowledge and insights with the rest of the CAPS universe.

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Fool contributor Matt Koppenheffer shares some thoughts of his own on his CAPS blog. He owns does not own shares of any of the companies mentioned. The Fool's disclosure policy does not have its own CAPS blog, but if it did, it would blow your mind.