Welcome back to another Foolish review of the hottest stocks as ranked by Motley Fool CAPS. We're looking at the three best-performing industries over the past 30 days and your favorite long and short candidates in each.

Time to mix it up, Fool. Stocks from Greece, up 37% over the past month, fell from second to third place, and last week's winner, sporting activities suppliers, are off the list completely.

So who's first? Domestic telecom services companies such as AT&T (NYSE: T) and Sprint Nextel (NYSE: S) initially looked like the leader, but the group's heady returns seem unfairly skewed by a handful of uber-movers.

Excluding them gets us to online gambling companies such as Motley Fool Hidden Gems pick CryptoLogic (Nasdaq: CRYP). As a group, these digital casino dwellers are up 49.2% over the past 30 days.

Second place, meanwhile, brings a new old-world entrant: industrial textile suppliers. Stocks from this sector are up 39.7% since mid-April.

According to you, our Foolish readers, the best stocks in these industries to own now -- i.e., those with four or five of the maximum five stars in CAPS -- are:

Company

CAPS Stars

No. of CAPS Ratings

Percent

Bulls

30-Day Price Change

Navios Maritime

*****

777

98.2%

31.6%

Tsakos Energy Navigation

(NYSE: TNP)

*****

567

97.5%

15.5%

Aegean Marine Petroleum

*****

490

97.1%

9.2%

Diana Shipping

(NYSE: DSX)

*****

1,604

97.0%

41.8%

Sources: Motley Fool CAPS, Yahoo! Finance. As of 5/16/08.

And your favorite short candidates -- i.e., those rated with one or two stars in CAPS -- are:

Company

CAPS Stars

No. of CAPS Ratings

Percent

Bears

30-Day Price Change

Albany International

(NYSE: AIN)

*

23

56.5%

(4.9%)

Unifi

(NYSE: UFI)

*

27

51.9%

14.1%

Sources: Motley Fool CAPS, Yahoo! Finance. As of 5/16/08.

My favorite stock among today's contenders is Tsakos Energy Navigation, a tanker operator that's benefiting from skyrocketing dayrates and -- according to comments made by chief operating officer George Saroglou in a recent Barron's interview -- long-term deals with integrated firms such as ExxonMobil and BP.

CAPS All-Star LemmingsRcoming pitched the stock in February for its cheap valuation. Quoting:

I calculate [Tsakos Energy Navigation's] actual value at $76.44 per share. In safety factors like profitability, management effectiveness, and financial strength, Tsakos would rank in the 81st percentile compared to S&P 500 companies ...

That's quite a claim. But is this top investor right? A quick check of the numbers supports the cheap thesis: Tsakos trades for 7.6 times trailing earnings, or nearly half the shipping industry average.

Of course, that's just one Fool's take. I want to know what you think. Would you buy Tsakos at today's prices? Let us know what you think by signing up for CAPS today. It's 100% free to participate.

Cap off your day with related CAPS Foolishness:

CryptoLogic is a Hidden Gems recommendation. Sprint Nextel is an Inside Value pick. Try either of these market-beating services free for 30 days. There's no obligation to subscribe.

Fool contributor Tim Beyers, who is ranked 18,232 out of more than 105,000 participants in CAPS, didn't own shares in any of the companies mentioned in this article at the time of publication. Find Tim's portfolio here and his latest blog commentary here. The Motley Fool's disclosure policy is hotter than the soles of a firewalker's feet.