I wrote a few days ago (only in german) about my requests to the 1und1-support for information about the hardware of our rootserver (to complete the PCI ID database).

Now, after their first reply, I now got another mail with more useful information: They pointed me to the tool dmidecode, which can find lot's of information about the BIOS and the motherboard. Didn't know that before, it's also useful to find out the BIOS version on a running system.

Now, this looks like what I was looking for:
Handle 0x0002, DMI type 2, 8 bytes
Base Board Information
Manufacturer: FUJITSU SIEMENS
Product Name: D2030-A1