So, it seems that someone has developed a third party firmware for the XTi. I know it's a fairly old camera at this point, but this firmware adds some features that could have/should have been available from the start. I just installed it and it seems to work just fine. I haven't heard of any XTi bricks being made by this, but as with all unsupported software, use at your own risk. First of all, it adds an expanded ISO range. It's possible to get ISO 16 all the way up to ISO 3200 in 1/3 stop increments (XTi native range is ISO 100 to ISO 1600 in full stops). ISOs above 1600 for sure increase the noise, but there have been plenty of times before I would loved to have ISO 3200 and dealt with the noise just to get the shot. It also adds spot metering, which to me was a pretty odd thing to leave out originally anyway. Also, it allows you to choose multiple focus points, instead of just one or all. Not sure of the usefulness of this one yet, but I'm sure there's a time for it. It adds a few other, fairly useless things, such as a factory menu that mainly has some diagnostic type things on it. Anyway, just posting this to see if any XTi users are interested in it. There's some other features I'd love to see, such as more than three shots in a bracket, and even an extended Exposure Compensation range (+/- 3 or 4 stops instead of +/- 2 stops). But it's certainly an improvement on the original firmware.