Hi, I read through the thread on the HP Scanjet 4370. One of the original posters said, that he would provide usb logs next week. Well, I had a few minutes left and so I did a restart of the scanner, a preview scan (black&white) and a scan (1cmx1cm black&white). You can find the log file at http://www.grafenhofer.at/hpsj4370/usbsnoop_replug_preview_scan.log.bz2 (6,7MB).
Please tell me if this is useful for someone, if I should provide more or better information etc. I am sorry, that I cannot help writing the backend on my own, but maybe I can help thisway. Regards, Dominik Grafenhofer
