Lonely Planet online is a website based on the Lonely Planet travel books. This link will bring you directly to the travel information page about Ghana. Here you will find a good deal of travel information to start your exploration of Ghana. The information is organized in the same manner as the books (which you can also order online here). The background info is organized by topic: Weather, Health & Safety, Government, People & Society, Culture & History, Time & Place, Crossing Borders, Money, Events and Transport.
Wikitravel is an excellent user generated travel guide supervised by administrators. On the Ghana travel page you will find the following travel topics: regions, cities, entry requirements, getting out, languages, eating, drinking and sleeping, learning in Ghana, health and safety, respect and contact. Information on site is mostly updated. However, we suggest you always check the travel advice from your own government first, before leaving your country.
This World Travel Guide provides comprehensive travel information and articles about Ghana. In the menu on the left you will find guides sorted by theme. The menu on the right side provides the table of contents for Ghana: overview, adresses, facts, public holidays, health, accommodation, doing business, communications, getting there, getting around, travel advice and a lot more. You can also create a miniguide that you can print.
World66 is a nice user generated travel guide made by travelers. Every part of the travel guide can be edited directly by clicking the  button. The guide about Ghana contains information about the following travel topics: general information, map, history, practical info, economy, health, people, books and a photo gallery.
Here you will find a nice online travel guide about Ghana. WordTravels guides provide information about the following topics: introduction, facts, health, contact, airports, map, weather, currency, visa, photos and flights. There are separate pages for activities, regions and cities in Ghana, activities and travel reviews.