@ under development
It's made it onto the order form, but our website is usually slow to catch on -- shall get that updated tomorrow. We're happy to answer questions via the "usual" support address in the meantime if anyone needs to know something!
support [at] support /dot/ bytemark (dot) co (dot) uk
The system does have 2 x 2.5" drives fitted, contrary to a comment above, and power consumption is 40-45W with everything accounted including the HDDs. Obviously not a patch on something like an AMD Geode or something ARM-derived but being able to install a standard x86/x86_64 distribution is a major boon as you'll get proper support from the likes of Debian and Ubuntu :)
Performance is pretty decent for a low-ceremony web server, comparable with the likes of a Pentium III 1GHz, having 2GB RAM "as standard" means you can look to caching your content to handle hits from El Reg and Slashdot, bundling two drives with RAID-1 as standard helps protect your data.
Our other value-range servers inhabit the same cases as pictured, and a Athlon64 LE-1620 outfitted with 2048MB RAM and 2 x 160GB (3.5") SATA is £70/mo. Pricing is much cheaper on an Intel Atom, because the CPU (LE-1620) alone will draw close to 45W in that system!
Customers who need to tick boxes like 'Redundant PSUs' or 'Hardware RAID' can look to our varied range of more enterprise-friendly servers based upon Supermicro - prices start at £135/mo. We've got you covered right up to a Dual Opteron 2354 with 32GB RAM, storage options also include 15,000rpm SAS on 3ware 9690SA RAID cards -- perfect if you're needing something really beefy.