[_jal]

Honestly, what's missing is a GUI builder for Postgres that non-programmers can use.

Others have mentioned Filemaker and Access, and I think that's exactly right - non-programmers can understand datatypes, that's not the issue. The issue is a UI they can use and (more importantly) iterate on themselves.

One of the major strengths of spreadsheets is "touchability" - your stuff is right there. Psql is the opposite - nothing is visible without the right incantation, and non-programmers can't do much about that.