In North America, the only way to get the Lilac PSP is in a bundle with Hannah Montana, an offer promoted by the infamous "OMG Lilac PSP" ad. In Korea, you still have to buy a bundle to get it, but the game included is ... Soul Calibur: Broken Destiny. The presence of a large portrait of Ivy on the top of the box suggests that the lilac PSP is intended to match Ivy's costume. Either that or Hannah Montana is confirmed as a playable character in Soul Calibur.
It's interesting that Sony Computer Entertainment Korea doesn't seem to be operating under the notion that the Lilac system is just for "girlz." The Soul Calibur PSP Lilac Purple Pack will be out August 28 for 285,000 won ($231).