Thanks for that tip...that Polish sim sounds very interesting. Is there a limited validity on it - ie. does it have to be topped up by a certain amount every now and then? If it lasts like a year I might just grab one to use in Poland as I will be visiting every month or two in the future.
For this visit I'm sorted though....I got the SMS a short while ago saying the Wind Mega 15000 was now active on my account. However, the credit still doesn't show up on 155.it but I've made a couple of short connections and they don't seem to be coming from my remaining EUR 3.50 of standard credit so it's all good!