Dear All, I received a lot of helpful replies, some of them offline, so I thought it might be useful to summarize here for the sake of others looking for this information:
- There used to be a bug that prevented booting from a USB stick. This is now fixed and booting should be possible, depending on wether the BIOS supports it or not. - [EMAIL PROTECTED] sent me (and posted to the list, so I will not repeat it here) startup messages from 3.7-current that show the startup sequence booting from a USB stick and correctly mounting the root filesystem. - I also received pointers to two companies/projects that sell ready made boxes of the type that I have in mind and who have a good track record for OpenBSD support: http://www.openbrick.org/ and http://www.soekris.com/. Many thanks to all who replied. As soon as I have received the boxes (and after I get the OpenBSD 3.7 CDs) I can post how things went, if there is interest here. -- Joerg Lenneis email: [EMAIL PROTECTED]

