Hypertable (www.hypertable.org) is an open source C++ implementation of Bigtable which runs on top of HDFS. Binary packages (RPM, debian, dmg) for Hypertable are now available and can be downloaded here:
http://package.hypertable.org/ Updated documentation, with a "Getting Started" guide, can be found here: http://www.hypertable.org/documentation.html - Doug Judd