This study extends TAM research into Latin America by examining email usage among two distinct populations and investigating possible moderating effects that Hofstede's four cultural dimensions have on the TAM constructs. The moderating effects are examined by using inferential statistics to test several hypotheses. Findings indicate that TAM functions well across cross-cultural boundaries but in their current form, it is impossible to test the impact of the individual culture dimensions on the relationships in the TAM model. To address this obstacle an alternative to Hofstede's measurement is suggested for future research.