If you don't know who she is because you spend too much time watching news programs that don't necessarily broadcast the news anymore, The Peking Duck has about the best round up (including side links etc.) of the story thus far.
In short, mother has child. Child goes to war for Bush, Child dies tragically (as all war related deaths are). Mother meets with Bush. Mother unsatisfied (despite what the right is saying). Mother wants to meet with Bush again. Bush snuffs Mother. Mother camps outside Bush ranch. National Media ignores mother. Blogosphere takes over. National Media continues to ignore Mother. Bush sends out Hadley the Handler to meet with mother. Mother still unsatisfied. Bush clears brush. Mother draws protesters. Michele Malkin and Bill O'Reilly and all right wing pundits destroy Mother's character in attempt to discredit Mother.
Mother statys strong still waits despite the right wing smear machine.
Right wing decides mother of dead soldier against bush worse than the days of communist Russia. Right wing decides supporting troops and troop families only applies to families of dead troops who support the President blindly.
Anyway Peking duck does a pretty decent job.