Marincak in E. Slovakia
>>> Any thoughts about subscription sites (i.e. ancestry.com, etc.) are any useful for central / eastern Europe? <<<This site + the Delphi site are about as good as it gets for Slovakia.
Your next step is to take a trip to the LDS Family History Centre.
1017 Prince of Wales Dr., Ottawa
Hours: Tuesday to Thursdays 9:30am-3:30pm, Tuesdays, Thursdays and Fridays 6:30pm-9:30pm;
Open 2nd and 4th Saturdays of the month 9:30am-12:30pm
Closed: Mondays, Wednesday evenings and daytime on Fridays.