Here are some websites that may be of interest

MVA & Chemometrics for TOF-SIMS Users (in Japanese)

The NPL webpage has an extract of multivariate analysis terminologies that was defined for ISO 18115-1 Surface Chemical Analysis – Vocabulary – Part 1: General Terms and Terms for the Spectroscopies. Apart from definitions they also have notes on applications and some best practice for surface chemical analysis.
You can find it at the NPL Chemometrics page (opens in a new window)

Eigenvector guides on MVA methods
Eigenguides - Eigenvector.com