According to the ROSAT website their current prediction says this.
http://www.dlr.de/dlr/en/desktopdefault.aspx/tabid-10424/
ROSAT - latest news
Last update: 21 October 2011, 20:42 UTC (21:42 CEST)
Re-entry of ROSAT currently expected between 22 October 2011, 18:00 UTC (20:00 CEST) and 23 October 2011, 12:00 UTC (14:00 CEST).
This would put it between 22OCT2011/11:00am PDT(2:00pm EDT) and 23OCT2011/5:00am PDT (8:00am EDT) for the USA.
Current altitude of ROSAT as I post this is about 111 miles.
Does this mean it is more likely to hit the US?