I\'m now switching to VIM
from TextMate. I found ^+W
in INSERT mode very useful. However, I\'d like to delete not only the word before cursor, but
It doesn't look like there's any built-in way to do it in insert mode, which was the question. Some of the other answers are correct for normal mode, as well as pointing out that a custom mapping could be created to add the functionality in insert mode.
Honestly, you should probably do most of your deleting in normal mode. ^W is neat to know about but I'm not sure I can think of a situation where I'd rather do it than esc to go into normal mode and have the more powerful deletion commands at my disposal.
Vim is very different from a number of other editors (including TextMate) in this way. If you're using it productively, you'll probably find that you don't spend very much time in insert mode.