  After reviewing the supertubes and super brane-antibrane systems in the
context of matrix model, we look for more general higher-dimensional
configurations. For D3-bar{D3}, we find a non-trivial configuration with E cdot
B not equal to 0 and describe the worldvolume gauge theory. We present the
string probe of D3-bar{D3} system and study the decoupling limits leading to
either noncommutative Super-Yang-Mills or NCOS theories with eight
supercharges.
