Roaming

I’ve just signed up for BTOpenZone WiFi roaming. The question is, if I’m off in some far-flung place and need to find a hotspot, how do I do it? I’ve looked at the online directories and signed up for Hotspot Hotel which seems to be one of the best. However, that’s no good to me if I’m in Amsterdam and haven’t a clue where my nearest hotspot is so that I can log in and look up hotspots!
What I really need is a hotspot directory that I can access from my mobile phone. I’ve seen a few American ones and BT Openzone run a SMS-based service that covers their hotspots in the UK. Has anyone got any recommendations for international SMS or WAP-based directories?