I can't find any information on what internal memory is (and used for). My phone (Motorola Milestone) currently has 35MB RAM free and 28MB Internal memory. I tried to find a web site explaining the difference, anyone know of one?
This is what Motorola claim for the phones specs (one type of RAM mentioned):
* RAM_capacity: 256 MiB
* ROM;capacity: 512 MiB (accessible: 256 MiB)
Removing applications seems to clear up some of each. If the internal memory is too low you get a notification, if RAM too low it seems to cause random issues (such as DNS failures or slowness).