Wikipedia is incredibly valuable as an information tool. It has replaced the old encyclopedias and has many advantages over them, primarily because it is constantly being updated and new sources are being added, it links directly to source information and it is free and available to all. There are plenty of checks for information in Wikipedia and alerts when information may be incomplete to warn the user. Wikipedia may not be perfect, but it is one of the best information tools out there right now.
Wikipedia has grown into an information giant. The information is growing by the day and its easy to find valuble tid-bits on there. You can find out any and everything you want to know about a subject. The information I have found on there personally never really held bias. The information is presented factually.