We've known about the LG KM900 Arena for awhile now but it's just now creeping its way into the U.S. market. Even if the big reveal was to be a secret, LG has made it apparent we're going to see this handset on U.S. soil due to a filing with the FCC.
The KM900 Arena will come with 3G support according to the FCC documents. In fact, the specifics are 850MHz and 1,900MHz WCDMA support. This means the phone will likely show up on AT&T, though that hasn't been confirmed or denyed.
At the moment, the only firmed features are WiFi access, but there's no indication previous information has been proven false, so you can expect a 5-megapixel camera, GPS and 8GB of storage on the Arena, plus microSDHC. We're taking a wait and see approach with this one, but with 3G on the docket, it's very likely this one will show up on AT&T soon.