I bought an Omega HH802U awhile back. I found that the graphing/datalogging software that Omega supplies for it is really quite poor. Luckily, one of my baristas is pretty handy with computer programing and was able to design me a software package. I have been using it for the past couple of months to plot my roasts in real time in addition to keeping a record of my roast profiles for future reference. The software is by no means perfect, but I have found it to be far more powerful and adaptable than Omega's. I don't know whether Omega uses a standardize communication protocol for all their usb and serially equipped thermometers, but I am happy to share this software with anyone on the list who wants to try it out.
Please consider this shareware. I would note that my barista devoted a lot of his personal time to developing this software, so if you do find it useful, I would encourage you to send him some token of appreciate. If interested, please PM me and I will send you a zip file and his paypal info.
Joel