http://www.google.com/mobile/goggles
Vasiliy Khmelenko actually showed me this.
Reading a product barcode is interesting, but being able to read MAC addresss barcodes would be useful.
Sudoku is cute, but really would like to take a picture of a dial meter or digit meter (water, gas, electric, steam, BTU) and have the reading come up. Would be a nice cross over with Google Power Meter. http://www.google.com/powermeter/about/
