For those who have over 50mb of RAM, are you constantly killing your apps or do you leave your phone running as is and then when you get you have over 50mb?
From my experience, my phone always stayed at a constant 35-40mb regardless on how many apps I had downloaded. It seemed like the phone kept my RAM at that level automatically and wouldn't go any higher or lower. In my ignorance, I used to kill all my apps to get the RAM higher when I first got the phone, but I know better now.
So point being, you're running with that much RAM without purposely, manually closing apps?