As promised:
http://www.statistics.sk/struk/volby.htm
Statistical Office of the Slovak Republic website on past elections, results, lists of parties, sometimes some graphs or explanations ...
Kinda erratic tho - i mean, the numbers it lists are all correct, I'm sure, but for some elections you get more (or very different) info than for others ... and there's quite a few 404s ("page not found"). Annoying.
Should you happen to be interested in the nitty-gritty I could email detailed tables and maps of the election results from 1990-1998, in percents and seats, small parties too, regional distribution, opinion polls ... (part of my thesis)