Sony is set to release the Sony Home Share VGF-HS1E in Europe before Xmas. The VGF-HS1E Home Share comes equipeed with 2 500Gb SATA drives and provides backup and remote access services for computers on the network. Looks like backup is triggered via a button press rather than via automated scheduling, which is a weakness, but the Home Share is DLNA certified, meaning it can stream content to a wider range of devices than a standard Windows Home Server machine (althought the HP MediaSmart Server and the FSC Scaleo are now both DLNA compliant thanks to PVConnect).
The Sony Home Share will be priced £499 (plus £100 for a copy of Windows Home Server from Sony Style.
More Info: Sony