Its a real small thing but would really be a nice feature to implement, which is allowing spaces when naming things but when you commit to the change or as your typing/importing, convert them to underscores. Its much more natural to hit the space bar then to make an underscore.
Maya has this feature and its much faster to rename things that need spaces, while you can just use capitals per word I feel its much easier to read for everyone when there is a physical space there.