Well, I was pointed in the direction of VoteMatch.co.uk

My results:

Scottish Green Party - 45/54
Libertas - 41/54
Liberal Democrats - 40/54
Scottish National Party - 38/54
Conservative Party - 33/54
Alan Wallace (Jury Team) - 30/54
Labour Party - 29/54
UK Independence Party - 18/54

I'd guess it's pretty much there, broadly speaking.

Never really heard of Libertas. Google search result #1 for 'em is quite funny. Their actual site won't load from here.

And looking down the list of policy positions at the end, Labour really is a long way from where you might expect it should be, idealogically. Scarily so, in some cases.

For more political quizzery, try the politicalcompass.org (or their facebook app). I got Economic Left/Right: -5.25, Social Libertarian/Authoritarian: -4.77.