Zen is a practice that asks us to pay attention.  Soto Zen is a branch of Zen that emphasizes our exploration of this matter together.  So we sit together whenever we can.

There are all sorts of history and philosophy as well...for those you might want to check out some other web-sites, like:

http://global.sotozen-net.or.jp/eng/index.html
   Sotoshu

http://www.sfzc.org/
   San Francisco Zen Center

http://www.szba.org/
   Soto Zen Buddhist Association of North America

http://en.wikipedia.org/wiki/Soto
   Soto Zen on Wikipedia

http://www.chebucto.ns.ca/Philosophy/Taichi/Zen/cyber_zen.html
   An enormous collection of Zen resources provided by the Halifax Zen Center.