Canon has a 1 color per cartridge philosophy? My MP490 takes 2 cartridges....one black, one color....
-Josh
That is because you are a cheapskate - the cheapo models use two cartridges and then they screw the money out of you for ink.
I always buy higher spec Canon models which use 4, 5 or 6 cartridges - which have no electronics.
For me it isn't just that they are cheaper to run (still not cheap though) - they are quiet and reliable and I find the drivers a less obtrusive and just work. Also they aren't full of promotional material and advertising unlike other mainstream manufacturers.
Compare to HP where driver packages are massive and are (at best) flaky on most models I have come across - requiring regular (and very time consuming removal and re-install .... never try their update system unless you like blue screens).
Epson drivers look like they were written in the 70s and whilst they do work are often not intuitive and lack many features (or hide them in obscure places).
Bother inkjets look like they were built in the 70s and always seem to have obvious features missing (eg. one client of mine had a business inkjet/fax machine - but the drivers did not support sending a fax from a PC - you had to do it manually at the printer).
Lexmark are ... well Lexmark. Junk printers, crappy, flaky drivers and ridiculously expensive consumables (and shame on Dell for rebadging them and selling them as Dell machines).
Having said all that at least Brother actually provide Linux drivers - I don't think any of the others do.