Yeah… I am thinking of selling my precious Canon EOS 400D lately. And started involve actively in photography forum to find out the best selling price for it. Then found this Canon EOS 400D Firmware Hack that interested me. Huh? What are the benefits for hacking the old 400D?

Spot metering with ISO 3200
New hacked functions
I love the additional ISO values. I can select from ISO 16 to ISO 3200 in 0.3 or 1.0 EV increments. Yup. Even Canon top end model like Canon EOS 1D series cannot go that low ISO. But the low ISO 16 is barely usable. Besides, the new focus frame pattern is even most advanced than Canon latest best 1.6x crop camera ~ Canon EOS 7D. You can play around all the custom AF points that you want. By the way, many of us have been complaining the useless of print button. However, with this hack. The print button becomes the hero. You will need it to select all the new features.
Interested with this Canon EOS 400D firmware hack? Head to 400D CHDK Wiki to get more info.
Really works does it? I’m quite skeptical…but i would love the spot metering function…
Even with access to 16 to 3200 ISO . . as you mentioned, I don’t think the sensor would be capabale of getting usable images. 3200 would be very grainy I imagine.