RedGate SQL Data Generator

RedGate launched a new tool for generating SQL server for dummy/test data.

Features:
- Full SQL Server 2000 and 2005 support
- All data types supported except CLR types
- Pre & Post Scripts execution
- Command-line access version
- Import data from CSV or SQL tables
- Customizable generator settings that allow configuring the amount of nulls, unique values, minimum and maximum values, etc..
- Diverse range of inbuilt generators

Please visit here for more detail.

By the way, I have already created few PERL scripts to achieve same type functionality to some extent.