Ancestry.com has added 11 new databases, many of which are specific to the Oklahoma Indian Record Collection that are very helpful if your ancestral connections lead to the Five Civilized Tribes. Some of the databases are fully indexed, some are just images that are browseable. Some of the dates go back to 1850. Some dates are as current as 1937. Even if you do not have a connection to the Five Civilized Tribes, some of the data may help you if your ancestors were possibly involved in the Oklahoma Land Rush era between 1889 to 1926. One of the files in general also covers Indian Treaties from 1722 to 1869.
The Periodical Source Index (PERSI) created by the Allen County Public Library’s Genealogy Center has long been a very useful research resource. In February, Findmypast added PERSI to their site. Part of the agreement allowing them to do that included digitizing the indexed articles. A recent post at The Ancestry Insider notes that they already have significant collection of historical articles (where the copyright has expired). You will need a Findmypast subscription to view the articles, but searching PERSI is open to all. Learn more at Findmypast.