Level 6 would be a full pandemic. Level 5 is the second highest and means that the swine flu is in imminent danger of becoming a pandemic. From this:

Raising the threat to level 5 means that there is sustained human to human spread in at least two countries and that people who have not visited Mexico have fallen ill and passed on the virus... ...Robert Madelin, Director General for Health and Consumer Protection at the European Commission, said: "In 200 days we will have an anti-viral vaccine for this influenza."

In other news, a Mexican toddler who'd travelled to Texas legally with his parents was the first U.S. death (link). And, a group of illegal immigration opponents are urging Congress to shut down the border (link).

UPDATE: There's more on the child who died here. They're trying to pinpoint where he contracted the disease; it might have been in Houston but there's some uncertainty about where they were when. See the swine flu entries for more on this topic, including Obama's complete failure to take border security - regarding both ill visitors and illegal aliens - seriously.

UPDATE 2: There's a Google map showing cases here; who maintains it and whether it includes all cases isn't known.