In reply to Nicholas Livesey:
In Bangor, theres the bluesky cafe which is lovely, but also the library, several other indie coffee shops plus costas & cafe nero, all of which have free wifi.
Hmmm. wondering if the library in Bethesda has it too, though it probably the same distance at Caban from Mynydd Llandegai.
Oh, and as a last resort, the one stop services just off the A55 has it too. It mings there though.