Getting the LG W3000H (or any other 30" monitor) to display in native mode with a notebook is tricky. It does not matter what resolutions your video card will support as the mobile versions of any video card is significantly modifidied from the one that you would install in a desktop. As an example, take a look at an nVidia 285GTX and a 285GTX installed in a notebook and you will see that the desktop version as hal the size of the notebook itself.
Essentially it boils down to two issues. First, power; and second, the highest resolution signal you will obtain from a HDMI port is 1280x800. If you have an DVI port, it must support a dual-link signal and be wired accordingly for the video card to support a 2560x1600 resolution. Most notebooks do not support that feature because they require huge power supplies (i.e. ~200 Watts).
If you want to display your LG H3000W at 2560x1600 resolutions, you will need a notebook that has a video card that supports that resoltion and sports a dual-link DVI port that is wired accordingly AND a Display Port. In addition, since the LG monitor does not have a display port, you will need an active link splitter (Bizlink Active Mini Display Port to Dual Link DVI Adapter: KS30008-191 at BEST PRICE
) suitable to your notebook to provide sufficient power to the DVI cable. If you have a 30" monitor with a Display Port (Such as Dell's), you only need a display port cable.
While you obviously need the latest drivers for the video card you have, no driver will give you the native resolution of your 30" monitor unless you have power to drive the signal. I have an Alienware AL17x and it works great, but I have yet to see any other notebook perform to this level. If you want to really enjoy your LG monitor, run it off your desktop with the right video card or pony-up some serious bucks for a serious notebook. You'll love it.