It would also be helpful if the Arduino IDE could automatically save the file before compiling/uploading... I found out this the hard way the other day, when I was exiting the IDE, it prompt me whether I wanted to save changes, I thought since I had compiled/uploaded many times before I chose no. And it turned out that nothing was saved.
Anyway, saving on compiling is kind of standard in other development environment so I think it should be made standard in Arduino as well.