Actually the update that patched the hack was in August.If it was manufactured in 08 it should be fine, all consoles made before the summer of 09 update are exploitable. You should be good to go.
Did you read the thread I linked you to? It says it in there. Any console made before 6-1-2009 and did not connect to Xbox Live on or after 8-11-2009 will be exploitable.