Haha I knew what your question was going to be before I even read it. It shouldn't smell all that good. All that CO2 coming off from the yeast tends to give you some funky smells. I wouldn't worry too much about the smell until you're ready to bottle. If you've got the brew in your bottling bucket and it still smells nasty, then I might be a little curious.
Whatever you do, don't stick your head into your fermenter and take a big whiff after a week of fermentation... it will take a long time for you to forget that smell
The smell during fermentation is not at all indicative of the smaell of the finished brew. You can tell if infections are present from smell, but a bad smell doesn't mean a bad beer necessarily...remember what the yeast are doing in there