The picture linked above is a photoshopped screen shot from the Lion keynote. The actual file will be included with Lion (and developer previews).
A little background if you're interested:
The flower in question is a lotus (Nelumbo nucifera) which blooms rich of symbolism, namely in the eastern traditions of Hinduism and Buddhism, of which Mr. Jobs is well aware.
From these perspectives, the roots of a lotus are found beneath the surface of pond mud, from there the stem grows up through the murky waters, and then finally the remarkably beautiful flower blossoms pristinely above the water, basking in the sunlight. This pattern of growth signifies the progress of the mind from the primeval mud of attachment, through the waters of experience, and into the bright rays of enlightenment.
It does not seem unreasonable to suspect that Apple uses this imagery, in full knowledge of its historical significance, because they believe their work is a continuation of this metaphorical progress.