This is a free blog system designed for especially engineers.
It has following features

• Mathematical expressions by LaTeX notation
  [math]
  L_o(x,\vec{w}) = L_e(x, \vec{w}) +
  \int_\Omega f_r(x,\vec{w}',\vec{w})
  L_i(x,\vec{w}')(\vec{w}'\cdot\vec{n})d\vec{w}'
  [/math]
• Highlighting source code
  ruby>>
  def ruby_method
  puts "Hello, world!"
  end
  <<--
• Customizable side bars
• SPAM-free comments by OpenID
• Automatic trackback receiving
  • It will be automatically detected if your article got linked.
• Extended MARKDOWN notation.
• Ready to OpenSearch

It is ready to be used as we've already done for 4 months.
But as you see, this is a REAL beta, because of having nearly no documents.

Please feel free to try it. And any feedback will be appliciated.