No money to buy lightroom. so using the free DPP software that comes along wif the Canon DSLR purchase. has the usual batch processing, contrast, brightness, sharpening, NR, etc. Havent used lightroom nor CS2,3,4 so dunno what I'm missing. maybe some bros can fill us up on the differences.
If you know someone in the education field. You could purchase CS4 Web premium for just $99. It's pretty cheap.
No education discount for Lightroom though.