Should I use an inline varchar(max) column or store it in a separate table?

Question

I want to create a table in MS SQL Server 2005 to record details of certain system operations. As you can see from the table design below, every column apart from Deta

Answer 1

Keep it inline. The whole point of varchar is that it takes up 0 bytes if it's empty, 4 bytes for 'Hello', and so on.