According to UAH AMSU daily temperatures, the average June 2010 day was 0.55 °C warmer than the average June 2009 day (near the surface). The implied warming rate is 55 °C per century. ;-)
Because June 2009 was relatively cool - with the anomaly of 0.05 °C - it means that the UAH anomaly for June 2010 will be around 0.60 °C which should still be enough to edge past 0.57 °C, the figure from the so-far warmest June, namely June 1998.
However, the final UAH database is using different satellites than the daily data - with smaller diurnal errors - so the final reading may change by as much as 0.05 °C which would also invalidate the claim about the "new record".
In 2009, the July anomaly was 0.39 °C higher than the June anomaly.
Roy Spencer says that the final reading will probably be 0.44 °C, which is 0.16 °C lower than one calculated above. It's a huge change caused by the new satellite. The daily data are therefore unusable and my confidence in the satellite record has dropped markedly.