Can be awkward. I know for a fact I earn the most in a team of 6, and I think a few of them have worked it out. However, I am very good at my job, and I feel I am worth it, obviously so do the firm I work for, as they employed me, and matched my asking price. What is awkward about is when, whilst talking to colleagues, who try to get the figure out of you slyly.
However, I am far from guilty, I feel I am the most competant at my job within my team, also, my CV (experience) speaks for itself. If others have issues with your pay, they need to bring that up with management/HR, and try and explain that they are as valuable as you are. One thing you should never do is divulge what you are paid, it may seem innocent, but it will open the gates of hell, and create huge rifts. Even if your fellow team mates suspect you are one more, they can not prove it. It's best to leave it that way.