Before I present my dilemma, here's some background on myself: I have graduated with a BS in CS last May, and have been working as an IT Analyst for almost a year now. I primarily create performance test scripts which are used for capacity planning on various internal/external applications of our company.
My problem is this: I feel like I'm very underworked here, and often find myself bored stiff. This is not to say I don't really enjoy what I've been doing; it's just that there isn't ENOUGH of what I do that needs to be done (can anyone say tongue-twister)?

I have bi-weekly meetings with my supervisor, and have told him on several occassions that I feel I am capable of much more than what I have been doing (yet still convey the message that I also enjoy the tasks I am given). He has encouraged me on getting certified (MCSE and MCTS: SQL Server are future certs), and has provided some guidance on how to position myself for more responsibility. There has also been discussion of pursuing my Masters part-time starting next year, since my company reimburses this. My supervisor has clearly shown interest in my career development, so it's not like he isn't listening.
My problem is that this doesn't seem to be getting me anywhere! I don't know if this is just the nature of IT and I just need to be more patient, or if I need to look for an alternative position (preferably within this company since I love being here, despite being bored). I am a very active person outside of work, who works out 5 days a week, LIVES outdoors, and generally can't stay still for a long period of time. I feel that I need more responsibility NOW, and am tired of struggling to find something to do. If I have to be here, I might as well bust my ass in the process (within the confines of an 8-5 shift)

I also feel that I need a heavier workload to really prove to my manager exactly what I'm capable of. If I'm not really being challenged, how will he (and my co-workers) really know how good I am? Sometimes I feel like I'm viewed as the "new kid" at the age of 23, and I may be dismissed from taking on responsibility because of that. I should also mention that every project I have been held accountable for has been successfull (at least on my end) and on time. I admit when I make mistakes, take advice from others, and make it a goal to learn something new every day.
I am very passionate about IT and what it offers, and am willing to do whatever it takes to not only succeed, but to be the best at what I do, whatever that may be. Please share your thoughts, comments, opinions, etc!