SQL Server: Has anyone used the large-page allocations tuning option? Has anyone used the tuning option of using TF834 large page allocations. I was just reading an MS article on it and was wondering if anybody had used it and seen performance gains. Are there any things to watch out for, tips, pitfalls?

The server is a Windows 2008 64 bit, 128 GB RAM, 4 CPU 8 core hyperthreded (total 64 cores)  SQL2005 server. I am looking to tune the server to better use its specs than just using the default SQL installation that is currently done on it. Any extra tips will be welcomed.
Thomas Kejser from Microsoft (blog) regularly presents that the 834 trace flag is the only go-faster trace flag for SQL Server. He would caveat that, I'm sure, with plenty of testing!