What Would You Recommend for IT Training?

ITPhantom wonders: "It is that time again and my supervisor has been coming around and asking what training and conferences I would like to attend in the upcoming year. I have recently been put in charge of the management and security of a few dozen machines in our department, and our internal network (simple as it may be). While most of the machines that I am responsible for are running Windows, there are a few Linux machines in the mix. I am fairly proficient with Windows, but have not had any real experience managing Linux machines, though I have been a casual user for about a year. With all of the options available, from online training to extensive boot camps and seminars, what would you recommend for training in the areas above?"