I've been recently exposed to a few Casio wrist watches which have the
ability to show temperature, pressure and direction.  I do understand
that there's a small market for these in the sports field, so I would
like to know the top players and models out there for land use as I
know there are a few focused on sea use.

References to their features and a picture would be appreciated and
perhaps an online resource to buy them?

Thank you.

/Lizardnation

Hello lizardnation-ga:

I remember when I was a kid, I was very excited when I got a watch with a 
calculator on it. Since than there have been great changes in technology. Now,
there are watches that can not only measure temperature, height, depth and 
such statistics but also they can detect heart rate, play music, act as a 
remote control for audio/visual devices and what not.

In answering such an interesting question, I would like to point you to 
certain brands that are leaing the high-tech innovation in the wrist
watch field. I will also provide you a link to a store where you may not only
shop for most types of watches but also get great information on any individual
watch. To me it is the best source on the internet. Before providing you
the name of the website, let me briefly point to high-tech brands.

Following are the brands:

THREE MOST HIGH-TECH BRANDS

1. Suunto
2. Casio brands
3. Oregon Scintific

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Suunto Watches

Suunto brand was specifically made for the high-tech industry. The company has 
a wide range of watches that are of the highest quality.
http://www.suuntowatches.com

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Casio Brands

Pathfinder by Casio
It is the leading brand when it comes to high-tech with watches that can
measure altitude, temperature and other features, all in one package. 
WEBSITE
http://www.casio.com/index.cfm?fuseaction=products.section&catalog=Watches&section=Pathfinder

Pro-Trek by Casio
These great watches come equiped with altimeter, barometer, compass and 
thermometer.
WEBSITE
SportTek store: http://www.sporttek.co.uk/acatalog/Pro_trek.html
Yahoo store: http://shop.store.yahoo.com/legendsinc/protrek1.html

G-shock by Casio
Self-proclaimed strongest man 'oops watches' in the world. But that is not it,
Some of them come with high-tech functions.
WEBSITE
http://www.gshock.com

Casio Databank, E-Bank, Technowear & Waveceptor
From computerized data storage clocks to other technolofical features, these
casio brands are well sought after.
WEBSITE
http://www.casio.com/index.cfm?fuseaction=Products.catalog&catalog=Watches

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Oregon Scientific

Oregon scientific watche comes equipped with all the high-tech features that a
tech-fanatic will like. They are made to be scientific. 
WEBSITE
http://www.oregonscientific.com/home.html
SAMPLES
http://www.ukweathershop.co.uk/acatalog/owt_sub.html

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OTHER BRANDS WORTH CONSIDERING

Nike Brands (Oregon, Triax, Ascent)
Timex (Expedition and Ironman)
Avocet
Adidas
Citizen 

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WEBSITE WHERE YOU CAN SHOP

Now if you want to look at most of the brands that I mentioned above, please
visit http://www.watchzone.com . It has most models for large number of brands.
You will also get dtailed information, prices and related specifications for 
each watch.

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Here is another useful article about ten multifunctional watches:
TEN MULTIFUNCTION WATCHES
http://outside.away.com/magazine/0698/9806revbuy.html

Useful Search Stratagy:

'high-tech watches'
'multifunctional watches'

I hope this will help. Please clarify, if you are not satisfied. I will be 
obliged to serve your needs. 

Sincerely,
leader-ga

Thanks. :-)

/Lizardnation