I'm curious how, how much, and where you store your photos....
Currrently, I run my photos in DxO for correction and exporting in *DNG format, and 170 photos was roughly 5gbs!
then I add them to the library in Lightroom for editing, presets etc, and export as jpg if i want to post them on flickr/fb and such
I don't think I'm at a level of photography where keeping the original RAW/DNG files is important to me (final jpg is enough), but everytime I delete the big originals lightroom tells me i have missing photos, and I'm not particularly fond of lightroom's libaray organization.
you guys must have crazy space if you keep all your raw files (tho i have 2TB total at the moment).