Unfortunately, a lot of people (including me) are having problems with the Market website telling them they do not have an Android phone associated with their account. Sometimes the person actually does have an android phone associated with the account, and has actually accessed the Market through the phone. When they go in through the webpage instead of the Market app, they can see their purchased apps, but can't download more. There are a lot of complaints on the Market forum about this issue. So it appears the webpage isn't really ready for primetime yet.
