Here are some more information for Wifi Sff:

Which Small Form Factor PC to make a media PC?

I'd like to take the components of my P4 Optiplex and add them to a small form factor PC that I can connect to my TV for music, movies, etc.
I have a 3GHz Socket 478 P4 HT, some PC3200 RAM, a PCI graphics card and a PCI wifi card that I'd like to add in to the system.
My initial research shows that most SFF PCs only have one PCI slot or half height PC slots - I'm keen to find one that will allow me to use my existing components.
I'm working to a tight budget on this one!

You can get this board for $50, set it into the Optiplex and put everything that you've got now back on!
It's pretty good for internet, word, jukebox music but in no way it's a HTPC for connecting to TV

http://www.newegg.com/Product/Product.aspx?Item=N82E16813157216

http://www.asrock.com/mb/overview.asp?Model=P4i945GC

And this is a real HTPC including Wifi & Bluetooth & Sata 3. 6GB/s & USB 3., everything: http://www.asus.com/product.aspx?P_ID=9BmKhMwWCwqyl1lz&templete=2

Review: http://www.anandtech.com/show/4134/the-brazos-review-amds-e350-supplants-ion-for-miniitx/5

Budget case: http://www.newegg.com/Product/Product.aspx?Item=N82E16811154091

Case for gaming: http://www.newegg.com/Product/Product.aspx?Item=N82E16811163172

Or more room for drives: http://www.newegg.com/Product/Product.aspx?Item=N82E16811163151

Puget Systems crams new Echo III SFF PC into Lian Li chassis
Puget Systems makes several small form factor computers that are in the Echo series including the Echo I, II and the new Echo III . The Echo III is packed inside a small Lian Li PC-Q08 black aluminum chassis and has Intel Core i5 and i7 options. It’s great to see a small computer get powerful CPU options. The mainboard inside the machine is a Zotac H55ITX-A-E unit with a mini-ITX form factor and ...

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