When I used to do a lot of traveling in the US and Canada I always used Earthlink for roaming dialup access. They seemed to have the most available numbers in the most places. But I don't really think they were any faster than other large providers.. just more widespread and available. These days I'd find it less necessary since there's so much available free hispeed access at hotels, airports, coffeeshops etc but at 10 dollars/month I'd still get a temp Earthlink acc't anyway just for backup.