After single hop F2 reports from Eastern Europe including Russia, I got my first report on 10m from Brazil at 1200z. I think it is probable that I'll get USA spots on 10m this afternoon.
UPDATE 1322z: The first spots from the USA were from N2NOM (5581km) at 1312z.
UPDATE 1455z: Several USA stations now spotting my 10m WSPR. On 6m WSPR I have again spotted G8VDQ (93km) a couple of times, but nothing further.