So... the case and HDD have already arrived. The only mini-ITX FM2 mobo I could find actually in stock anywhere is now in the post as is most of the rest. A couple of items are awaiting supplier stock (promised in quick time so let's hope that's true!).
I found another Sony Blu-ray ODD that appears to have it's eject button on the left (to sync with the eject button on the case). About 50% of the Google Image search results have it on the left, the other 50% more centrally. Anyway, Amazon's picture has it on the left so if it's not I shall return it!
Final component list (and prices) below. No cost needed for OS or app SW as I'm going to put either Linux Mint XFCE Edition on there or try an Ubuntu minimal install (i.e. CL-only!) and then put XBMC on the top. I've got a couple of remote control options, first is XBOX 360 wireless controllers (which should be good for general navigation in XBMC as well with the console emulators) but if I can't get them working I've also got a Gyration remote.
When the mobo and things start to arrive I'll put a build log up or something as this could be very interesting with such a tiny case!ASRock FM2A75M-ITX AMD A75 Chipset (Socket FM2) DDR3 Mini ITX
£78.16
60GB Corsair Force Series 3, SATA III SSD, SandForce SF-2200, Read 525MB/s, Write 490MB/s, 80K IOPS
£54.24
AMD A10 5700, S FM2, Virgo Core, Quad Core 3.4GHz, AMD Radeon HD 7660D 800MHz, 65W, Retail
£91.88
8GB (2x4GB) Corsair DDR3 Vengeance Jet Black Low Profile, PC3-12800 (1600), Non-ECC, CAS 9-9-9-24, XMP, 1.5V
£29.76
Streacom F1C Silver Home Theatre Aluminium Chassis
£55.82
Hitachi 1TB Travelstar 2.5" SATA-III Hard drive- 5400RPM 8MB Cache
£68.00
Sony BD-5850H 6x Slim Internal Slot-in BD Writer
£68.68
picoPSU 160W picoPSU and AC/DC adapter block
£89.99
Reeven Vanxie RC-0801 Low Profile CPU Cooler
£20.99
Scythe Mini Kaze, 40mm x 10mm Quiet Cooling Fan
£6.12
A bit of P&P
£6.81
TOTAL £570.45