Online Banking
MJ Ray blogs about online banking, and how they're all stupid. I wish I could feel his pain (sortof...), but I don't. And that isn't because I don't have an online banking account, since I do.
My bank actually thought about this stuff before implementing it. Rather than using a silly password, they have an implementation that makes use of the Digipass, a small hardware token you get as part of your contract. If it breaks or I lose it (and yes, this has happened), I go to the bank and immediately get another one, without being charged additionally for it (at least not if I don't need one digipass every other day).
Their webserver implementation involves a standard HTTPS server, and a set of webpages of which I'm not entirely sure whether they're standards-compliant, but at least they've tested it on more browsers than just IE; and since they don't require any other client-side software besides a browser, it easily works on free operating systems.
If I wanted to, I could also use a smartcard reader and my regular debit card -- but I don't have to. That's the good part about it.
The only downside about Fortis is that they're not the cheapest. But that's okay—I don't mind paying for quality.
I have the exact same experience with Swedbank, formerly Föreningssparbanken, in Sweden. They do the exact same thing, and I've been using them on Linux without issue since 2000 or 2001.
The little code gadget, which I assume is the same as your digipass provides excellent security from what I can tell: not only is the login protected, but all additions of new accounts to pay to as well as every transaction is seeded by the numbers of the account or the transaction itself. The number for login is also only good for 3 minutes.
Unless someone gets access to both by personal account number and the encryption key of the digipass (and knows the algorithm), it's unlikely that even a live man-in-the-middle attack would succeed. Anything is, as usual, possible of course, but this seems about as good as it gets without being obnoxious to use.
All-in-all, I'm very happy with this bank. I have no idea if they provide good interest or is expensive - I don't handle that kind of money where I think it matters anyway, and the service is just awesome for a die-hard Linux user.