The Motley Fool's CAPS investing service is a great way for investors to work together to beat the market -- and maybe get famous while they're at it. Among its features, CAPS lets users blog about their picks, investing strategy, market view, yesterday's lunch, or whatever floats their boat.

As the CAPS blogosphere continues to grow, players are adding more great content on a daily basis. I've dug through the past week's posts to find some of CAPS' best insights. Of course, with room for only seven posts, I can't possibly cover all of the great stuff in the CAPS blogosphere. So when you're done here, I highly recommend heading over to CAPS and checking out what some of the other investors have to say.

Amazon Q2 conference call preview
Later this month, we'll get an update on how (NASDAQ:AMZN) is dealing with a tough economy, when it releases earnings and holds the requisite conference call to discuss the results. In the meantime, CAPS blogger LouieJunior is getting out ahead of the game with 10 things he expects we'll hear on Amazon's earnings conference call. Jump over to his blog to get his (tongue-in-cheek) thoughts.

An energy plan that makes sense
The Exxons (NYSE:XOM) and ConocoPhillips (NYSE:COP) of the world are raking in big bucks from the current trend in energy prices. How sustainable is this trend? Well, as saunafool highlights in his blog post, there's at least one legend of the oil industry already starting to invest a lot of money in a bold new direction.

Stop complaining about gas and food prices!
Sometimes, all it takes is a good look at the big picture to put things in perspective. For fellow Fool TMFPhila, a great graphic from The Economist reminds us that maybe the currently higher food and energy prices aren't the end of the United States as we know it. Check out TMFPhila's blog for a look at the big picture.

Still short Mexican airports
As high oil prices continue to ripple through the global economy, CAPS All-Star TMFDeej has picked up on the lackluster performance of Mexico's publicly traded airports. While Grupo Aeroportuario Centro Norte has seen a rapid slowdown in growth, Grupo Aeroportuario del Pacifico (NYSE:PAC) has actually started to see a dropoff in passenger traffic. Head over to TMFDeej's blog for his analysis of the situation, as well as a look at a potential spinoff at GE (NYSE:GE) and the massive amount of time that Americans spend in front of the TV.

Today's funny
Does that nasty market have you down in the dumps? Well feiled's recent blog post may not help your portfolio, but it will likely bring you a much-needed chuckle. Go ahead, click through already!

Quality Systems
Of all the industries lagging when it comes to technology, I find it disturbing that medicine is one of the top offenders. Stock Advisor pick Quality Systems (NASDAQ:QSII) is one of the many companies trying to right this situation with its medical- and dental-practice-management software. In a recent blog post, bert111 took a look at Quality Systems and concluded that this is a stock worth owning. Check out bert111's blog for the full story.

Someone get Americans a math class!
Starbucks (NASDAQ:SBUX) may be shutting down a good handful of stores (600 to be exact), but CAPS blogger and fellow Fool TMFBent thinks that regular 'Bucks patrons need to double-check their math if they're losing sleep over whether their nearby store will get the ax. Head over to his blog to run the numbers.

And that's our roundup for this week. Be sure to check back next week for more great blogging action. In the meantime, why not head over to CAPS and add your two cents to the community pool?

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