HP’s ProBook 4310s, a 13.3-inch laptop for business users, is now available for purchase.

Starting at 4.3 pounds, the new ProBook features the Intel Core 2 Duo processor, up to 8GB of DDR3 memory, the Intel GMA 4500MHD integrated or the ATI Mobility Radeon HD 4330 dedicated graphics chip, up to 500GB of hard drive space, a DVD burner or Blu-ray combo drive, and a 4-cell or 8-cell battery for up to 5.25 and 7 hours of battery life respectively.

Its 1366×768 display uses LED backlight and anti-glare or glossy coating, depending on customer’s choice.

The ProBook 4310s sports a keyboard with keys raised from the surface, stereo speakers, an integrated microphone, optional 2MP web camera, WiFi, a Gigabit LAN port, optional Bluetooth, a 56K modem option, optional mobile broadband, three USB ports, an ExpressCard slot, a Secure Digital slot, HDMI and VGA outputs, and an optional fingerprint reader.

The laptop runs Windows Vista OS and starts at $779.

Acer Aspire One D250

Acer’s new 10.1-inch netbook, the Aspire One D250, is now available. The 2.4-pound Acer Aspire One D250, also known as AOD250, comes with the Intel Atom N270 processor at 1.60GHz, the GMA 950 integrated graphics, a 160GB hard drive with Windows XP Home preloaded, 1GB of RAM, a 3-cell battery as a standard, and a built-in web camera. The 10.1″ display has a resolution of 1024×600 pixels.

The D250 has the same core components as the previously launched D150. However, the D250 features a slimmer design with a height of 1 inch, as well as a rearranged port layout.

Acer’s new netbook sports stereo speakers, 802.11b/g WiFi, an Ethernet LAN port, three USB connectors, a multi-in-1 media card reader, and a VGA output.

The manufacturer’s suggested retail price for the D250 is $298.

At the time of this writing, the netbook can be purchased online only through mWave, which offers the white Aspire One AOD250-1326, black AOD250-1151, blue AOD250-1165, and the AOD250-1116 in Red. All models are priced at $309.

Lenovo has launched the IdeaPad Y550, a 15.6-inch entertainment notebook based on Intel’s processor.

The laptop features the Intel Core Duo or Core 2 Duo CPU, the GMA 4500MHD integrated graphics or the NVIDIA GeForce G 105M 512MB dedicated graphics card, up to 4GB of DDR3 memory, up to 500GB of hard drive space, a DVD burner, 802.11n wireless, and a Bluetooth module in select models.

The 15.6″ LED backlight display has a resolution of 1366×768 pixels and a 16:9 aspect ratio.

According to the earlier announcement, the IdeaPad Y550 also features Dolby Home Theater surround sound, a web camera, and a multi-touch touchpad.

The latpop runs Windows Vista Home Premium OS and starts at $669.00 at Lenovo’s website)