Just for reference, here's the JPL Sentry page on Apophis. I'm not sure, but I do not believe this includes the new telescopic observations, though I am not sure, since the article doesn't state when they were made. The latest observations included are from January 2008.
Apophis is the 4th highest risk asteroid on the JPL Sentry list.
Here's the small body data base page with orbit diagram:
Torino Scale (maximum) 0
Palermo Scale (maximum) -3.08
Palermo Scale (cumulative) -2.97
Impact Probability (cumulative) 7.4e-06
Number of Potential Impacts 6
Analysis based on 2 radar delay, 5 Doppler, and
633 optical observations spanning 1395.6 days
(2004-Mar-15.10789 to 2008-Jan-09.665088)
The 6 potential impacts are from 2036 to 2103 CE
Here's the statement from the NEODyS team:
The asteroid (99942) Apophis (previously designated as 2004 MN4) will have a very close approach to Earth in 2029. As a consequence of this, the orbital uncertainty will be increased by a factor about 40,000, and after that could have close approaches to the Earth in different years, including in particular 2036 and 2068. Recently submitted data from Mauna Kea and an in depth reanalysis of both observational biases and possible contribution from Yarkovsky effect, as presented by Chesley et al. at the DPS meeting taking place in October 2009 in Puerto Rico, suggest that collision with Earth in several different years, but especially in 2036 and 2068, cannot be excluded based on the best possible analysis of the available information. The NEODyS/CLOMON2 team, in collaboration with the JPL/SENTRY team and others, shall continue to process new data and to evaluate new models as they become available with the goal of keeping the information we provide on Apophis up to date.
The NEODyS/CLOMON2 team, October 7, 2009.