Intel’s HD Graphics 3000 is the integrated graphics in most of the Sandy Bridge notebook processors ( HD Graphics 2000 is featured in some of the desktop Sandy Bridge processors).
The HD Graphics 3000, substantially improves upon the earlier Intel HD Graphics ( called Intel HD GMA or Intel HD Graphics Media Accelerator). While it is still short of ability to play most of the modern fast moving games at full resolution, Intel is approaching gradually towards it.
The HD Graphics 3000 still lack the DirectX 11 and you will have to wait till the arrival of the Ivy Bridge ( some times in April 2011). It also trails in performance when compared to the integrated graphics in different flavors of Llano APUs from Intel.
If you are not into high end gaming HD Graphics 3000 is a great. It saves power that otherwise would have been required by a discrete graphics ( in notebook processors) or a graphics card ( in desktop processors). If you are into gaming, you may like to choose a system that has an external graphics. Or possibly choose one of the AMD’s Llano APUs.
Compare-processors.com has several comparison posts, comparing HD Graphics 3000 with other graphics /integrated graphics. You may like to check it.
Here are some of the comparisons with integrated graphics in AMD’s Llano APUs.
Comparison with Brazos Platform Integrated Graphics
Some comparison with other discrete graphics
If you have more questions, you may like to check out the forum.