Many aircraft are inbound to Oshkosh right now. There are several warbirds in the air and a large number of GA types as well.
You can track the aircraft on the asdbexchnge.com flight map.
I've seen AT-6, TP-40, P-51, DC-3. B-24, B-29 listed so far this morning.
https://globe.adsbexchange.comClick on a single aircraft icon to view details for that aircraft.
If you want to filter for military aircraft click the "u" button.
To track a particular aircraft click the aircraft icon and then the "I" button.
Aircraft "N" numbers can be shown by clicking on the "L" button
To select multiple aircraft to track, click on the "M" button