Use Mergent Online to access Mergent Country Profiles: 

• Click Country Insight tab
• Select country/ies of interest
• Enter date range, if desired
• Search by Document Type: Mergent Country Profile
• Click Search button

Business Source Complete contains country profiles from CountryWatch, MarketLine, IHS and PRS (Political Risk Yearbook).

EIU ViewsWire — part of ABI/INFORM — covers 60 countries, focusing on the regulatory and business environment.  Note: once on ABI/INFORM, go to the Publications tab and then type "eiu" in the search box. Search by country name in the TI Title field and then limit to Country Reports as Source Type.

The CIA World Factbook is a good resource for quick overviews and country comparisons.

Also, check out resources mentioned in the International Business Guide.