Well, for any of you who did not get to this site through Eric (CT), then you need to know about
CellarTracker. It is hands down the best wine tracking software availible, web based or other. It may not be the flashiest, but it has one of the largets (is the largest?) database of wine and you can easily enter any wines not already there, making the db larger.
It is free or low 'donations' for some extra content/featurs. It is fully capable of wine list, reports (spending, drinking, etc.) and will let you keep track of your wine. If your collection is large (or important) enough to keep track of the temp. and humidity, then you need CellarTracker.