Need Help on this Mini-Itx motherboard

I have always wanted to build a computer small as possible fitting to a size of DVD Player just for gaming replacing a console. Im not sure if a Mini-Itx with pci-e 16x is compatible to a Nvidia 8800 gt. Need to know if any pci-e card is compatible or has to be a specifig card design for mini-itx. This is the motherboard Specs.

CPU: LGA775, Supports Intel® Core 2 Duo processors, 533MHz / 800MHz / 1066MHz
Memory: Two DDR2 sockets support up to 4GB DDR2 SDRAM, PC533/667/800 DDR SDRAM
Chipset: Intel® Q965 chipset & ICH8
Video: Intel® Q965 integrated graphic sybsystem (GMA3000)
I/O: JMicron JM368 (PCI-e to PATA) supports 1 PATA channel, One RS-232 and one RS-232/422/485 COM ports, Supports 4 SATA II Ports, Supports 6 USB ports (4 ports + 2 ports via pin header), PS/2 Keyboard & Mouse ports, 1 PCI-e (x16) slot, 8x2 pin header for adaptor card: ID394 (2 or 4 serial ports)/ ID395 (TPM 1.2 function), PS/2 KB/Mouse Mini DIN, VGA CRT, COM1, 2x RJ-45, 4x USB, Triple jack for audio, 4x SATA, USB5/6, COM2, Digital I/O, 7.1 channel audio, IDE (40-pin), CPU fan, system fan, ATX power (24-pin + 4-pin)
LAN: Intel 82562V 10/100 BaseT Ethernet
Audio: ICH8 integrated audio with Realtek ALC888 codec

http://www.ibasetechnology.net/mi900.html

I just visited a website called mini-itx.com. You might want to check them out. Don't know why you need such a small format. the 8800gt requires a decent power supply and airflow, which mini-itx cases aren't designed for.