Hi,
With regards to your query, it seems that you would like know whether Backup Exec 10.0 supports Beta version of SQL 2005. Presently Backup Exec does not support SQL 2005 however, you could register yourself for an email notification program which will notify you when Backup Exec will support SQL 2005.
Please refer to the following link for the same:
http://maillist.support.veritas.com/subscribe.asp
We hope this will help.