I am on an email list for the Nephi Project, and I get some interesting information. This is a group that does most research in Saudi Arabia, and has uncovered some interesting discoveries supporting the Book of Mormon. They also release information that others might find interesting for new world sites.
In the latest email they sent, is a link where they discovered a stone box, similar to the one that Joseph Smith described when he discovered the Golden Plates. The link is a Word doc, and shows some pictures.
They also have a link to the Archaeological History of New York. The link shows that carbon dating has been done, and reviews the various groups. The closest group to the Jaredite time period would be the Laurentian Culture, which existed about 3000 BC, but it seems this group was not as advanced as the Jaredite culture appears to be in the Book of Mormon. The Hopewellian Culture appears to be the best match for the Nephite time period.
In an earlier post on Book Of Mormon Geography, in the comments we discussed the New York Theory. While I intend to give a more formal review in the coming weeks, I just want to mention that the theory at True Book of Mormon Geography relies heavily on Iroquois archaeology. However, the link above, taken from Sept 1952, implies that the Iroquois didn’t inhabit the NY area until 1200 BC, which is roughly 700 years after the Book of Mormon. It seems that Hopewellian culture archaeology would be a much better match for NY claims.