http://ark.intel.com/products/58916 says that the memory controller for the Intel Atom N2600 is limited to 2GB, not 4GB.
Vianyfel, this $11 memory module will do what you want: http://www.newegg.com/Product/Product.aspx?Item=N82E16820148490
This has been "released". As is often the case with laptops, inventory is rolling in slowly. Order now and you should get yours by your birthday and certainly not long after. I say this because Acer's website is currently showing this model as being available and for sale.
According to Acer's own product page, this has both HDMI and VGA. I can't see the HDMI port either, except that there are two ports on the left hand side of the unit that I can't identify. But they seem to be vertically aligned. Maybe one is ethernet and the other is HDMI?