I have to agree with Andy... and I was going to say it before I even saw his post, I swear! I think that having images is a positive thing for two reasons:

1. It helps to vote more quickly when the contest is narrowed down into the quarters, semis, and finals. I find it much easier remember a given song by its image, and then I don't have to spend hours and hours getting through all the possible match-ups when I've become familiar enough with the pool! smile

2. I would also look on the picture uploading option as another opportunity to market yourself. People are more likely to remember you as an artist if you have some sort of visual that identifies you. Pixelated or poor quality photos do lack a certain appeal, but serious musicians should know to always put their best foot forward.