This answer is a bit late to the party and also a shameless plug. 🙂
Regardless, try my Indent-Guides.vim plugin. It was created to scratch my own itch regarding the lack of indent guides in vim. I got fed-up waiting for someone else to come along and build it, so I just did it myself.
Features:
- Can detect both tab and space indent styles.
- Automatically inspects your colorscheme and picks appropriate colors (gVim only).
- Will highlight indent levels with alternating colors.
- Full support for gVim and basic support for Terminal Vim.
- Seems to work on Windows gVim 7.3 (haven’t done any extensive tests though).
- Customizable size for indent guides, eg. skinny guides (soft-tabs only).
- Customizable start indent level.
Here’s a few screenshots of the plugin in action: put your mouse here and click.