You have a good point. The problem is that annual fees vary tremendously within a given card issuer's offerings, which would require making the table far more complex. It gets even more complex when you start trying to figure in APRs for people who carry balances or minimum balances for the bank accounts we list.

We've therefore kept the page focused purely on the foreign exchange transaction fees imposed by the card issuers, ignoring annual fees, rewards, interest rates and other account features that should figure into your decision of which card to use. Trying to include all that information would simply be too great a task (we have a hard enough time keeping up with the constant changes to forex fees).

edited to add: Also, annual fee information is readily available elsewhere, while information about forex fees is sometimes very hard to get (the card issuers themselves often get it wrong when you call to ask). That's ultimately the reason we started the wiki.