I decided to follow this
post when restoring my 8GB 3g and I thought the memory meter on hood was really cool so I decided to check memory usage for some common apps. I followed the method in the linked post and installed ssh and hood. Here's what I found so far:
all measured immediately after reboot:
avail mem Hood/SSH installed - 51 MB
add winterboard (no theme) - 48 MB
add beautiful 2 theme w/radiance icons - 48 MB
add categories (2 folders) 45.5 MB
add irealsms - 45.5 MB idle - running - 40 MB
remove irealsms add mysms - 45 MB idle - running - 40 MB
Kind of interesting, Winterboard was about what I figured and categories was less than I had guessed. I also thought mysms used a more memory than ireal but its about the same.
Getting late, maybe I'll do some more tomorrow, I thought it was pretty cool data though so here it is.