I have a 2 part question.

1) Are there any BSD Distributions that run from Ram such as SliTaz and Slax (linux)?

2) How is BSD used commercially? What type of companies run BSD, is it mainly for Web Servers?

Thanks

Any live CD you can find will load a limited system into memory.
Pretty much in the same manner as Linux, although the *BSD market is smaller. Examples:

• Yahoo! uses FreeBSD for much of its internal infrastructure.
• Juniper Networks bases much (if not all...) of its products on a FreeBSD core.
• IronPort, now owned by Cisco, built all of its email server products on a customized FreeBSD core.
• The German ISP http://www.bsws.de/ runs nearly exclusively on OpenBSD.

Other examples exist, but this is all that I can recall.

Most *BSD installers also load limited systems into memory. OpenBSD's bsdrd kernel is an excellent example.

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Thank you,
I'll just share these links for anyone else who happens upon this thread.

• Free Bsd
• Net Bsd
• Open Bsd

I may be missing some.

Yes, there are:

• Frenzy

Frenzy is a “system administrator portable instrument”, LiveCD based on FreeBSD OS, which allows the administrator to boot from it and get fully functional system with wide variety of software for tunning, testing and analyzing the network, testing computer hardware and much more. There are several options at boot time, including toram (the entire system is loaded to memory, CD/DVD-ROM not needed), ramdisk (option to set the memory disk sizes) and more. Also features FEM - Frenzy Extension Module system, which allows to add software to LiveCD without modifying CD itself, in a similar to SLAX modules and Damn Small Linux MyDSL system.

• RoFreeSBIE

Live CD, partially loads itself into memory, installable to hdd.

Nokia relies heavily on FreeBSD (firewall), Panasas (distributed file system), Netasq (firewall, VPN and content filtering) just to name some. Wikipedia has a more detailed, but still incomplete list, i believe.
FreeBSD is not only for webservers, can easily be used as desktop/workstation OS, but it really shines when used as server platform, being it a web-, database-, mail- or file server, a firewall, router or IDS, you name it.

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Devices/Products Platform

http://www.apple.com/
http://www.cisco.com/
http://www.juniper.net/
http://www.netapp.com/

Server:
http://www.yahoo.com/
http://www.yandex.ru/
http://www.apache.org/
http://www.rambler.ru/
http://www.sina.com/
http://www.pair.com/
http://www.sony.co.jp/
http://www.netcraft.com/
http://www.163.com/
http://www.wni.com/
http://www.telehouse.com/
http://www.experts-exchange.com/