Both the bleeding edge/experimental builds will be updated within minutes of new changes being approved by one of the maintainers. That’s much more frequently than nightly, btw ;).
Once we’re ready to release 0.6, I’d like to provide both the GDI and SDL versions - especially if the SDL build is indeed massively faster, as it seems to be.
The key for exiting vehicles was recently remapped (leaving it on ‘e’xamine was a little funky). It’s now in the vehicle control menu, accessible by default from ‘^’. You may need to go into the keymap page (’?’, ‘2’) to set that keymap up if you don’t have it for some reason (e.g., if you copied over your old keymap file).