The Motley Fool's CAPS investing service is 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. To make it easier to find some of the gems out there, I've dug through the past week's posts to find some of CAPS' best insights. Of course, with room for only seven posts here 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.

Peak oil in Saudi Arabia?
As it is, I can't help but groan every time I pull into a gas station. But what kind of petroleum price situation could we be heading toward if Saudi Arabia, the Michael Jordan of oil, is on the production downswing? The thought isn't that outlandish, as CAPS blogger saunafool details in his recent blog post. Head over to saunafool's blog for the full story.

Bill Ackman: shady or just sharp?
Bill Ackman of Pershing Square Capital Management has a plan for Freddie Mac (NYSE:FRE) and Fannie Mae (NYSE:FNM). Of course, he happens to be short the stock and the plan calls for equity holders to be wiped out. As fellow Fool TMFBomb put it, that's "the investing equivalent of taking out a life insurance policy on his wife and then shooting her." So is Ackman just doing his capitalist duty or is he downright shady? Check out TMFBomb's blog for his take.

I'm huge in Asia!
Did you miss fellow Fool Joe Magyer's appearance on CNBC Asia? Fear not! Posted on his blog is a link to the interview. Tune in and enjoy!

Is alternative energy really the answer?
How much and how quickly can we benefit from alternative energy solutions? Ask T. Boone Pickens or investors in Trina Solar and First Solar (NASDAQ:FSLR) and the answers would likely be pretty positive. On CAPS, though, VTEngineer2001 isn't as convinced. Click through to his blog to see why.

Will the financial sector ever recover?
If you asked me this question, you'd get a resounding "yes." Stocks like Wachovia (NYSE:WB) and Wells Fargo (NYSE:WFC) have been beaten to a bloody pulp, but it's not like we haven't seen this before. A look back to the 1989-1990 period shows a similar thrashing of bank stocks -- a thrashing that was followed by a screaming recovery. Not everyone is as sanguine as me, though. TMFTmonie recently blogged that not only have the banks been beaten down for good reason, but constraints on leverage will keep a lid on them into the future. Hop over to TMFTmonie's blog for the rest of the story.

Down 26% -- but not cheap
Who could CAPS blogger LouieJunior be talking about? None other than Internet retailer extraordinaire (NASDAQ:AMZN). Visit Louie's blog to find out why he isn't planning on taking the plunge into Amazon quite yet.

Should you buy a collapsed bridge?
Chicago Bridge and Iron (NYSE:CBI) took a serious beating on Wednesday thanks to its pre-announcement of some big project losses in the UK. TMFDeej thinks that rather than being a time to run for the exits, this could be a great buying opportunity. Take a visit to his blog to find out why.

And that's our round-up 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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Chicago Bridge & Iron is a Motley Fool Global Gains pick. Amazon is a Stock Advisor recommendation. Try any of our Foolish newsletters today, free for 30 days.

Fool contributor Matt Koppenheffer does not own shares of any of the companies mentioned. The Fool’s disclosure policy enjoys reading these blogs even more than re-watching past seasons of 24, and the disclosure policy is a huuuuge Jack Bauer fan.