In our MOSS server database, the SharePoint_Config_log.LDF file of database SharePoint_Config grows drastically. surprisingly it reaches more than 100 GB in months time... due to this there occurs lack of disk space. Currently I have scheduled to run a SQL query given by my friend to shrink the LDF file.
BACKUP LOG SharePoint_Config WITH TRUNCATE_ONLY
DBCC SHRINKFILE (SharePoint_Config_Log, EMPTYFILE)
For time being this is the solution, If you are aware of any other permenant solution, please do let us know :)