One of the things one typically imagines is that the volume of the haystack (formerly known as the landscape) is very large. How large is large?
Take the quintic hypersurfaces in CP^4. They have 101 complex structure moduli. Construct the 101-dimensional moduli space, determine its Kahler metric from the kinetic terms in type II string theory, and measure its volume. What will you get? Something like
- 1 / 5^24 times...
- 1 / (5^24 times 120!)
- det (R - omega)