From an AP article on the planned comeback:
The 37-year-old Radcliffe, who won the marathon at the 2005 world championships, has next year's Olympics in London in her sights.
(Read full article at USA Today)
Radcliffe has managed to pull this type of thing off before: After her first child was born, she was running -- and winning -- big international events by late 2007.
Before giving birth to her second child, the 37-year-old Brit's last race was the 2009 New York marathon, where she finished fourth, according to the BBC. She is quoted in that outlet saying that she is "confident of what I have to achieve in the build-up to London 2012."
Radcliffe is currently training in Albuquerque, New Mexico, according to The Telegraph.
Radcliffe has company in her return from maternity* to the elite field: Kara Goucher and Deena Kastor are also in the middle of comebacks.