Here’s some great links I’ve found that have come to be pretty useful over time:

My favorite and often amusing genealogy blog: Genealogy Roots Blog
Olive Tree Genealogy Blog
Genealogy Research Blog
Lorelle VanFossen’s Blog – a personal family blog with some great updates on the world of Genealogy from time to time.

The standards:
Ancestry.com
Family Search
The National Archives
Rootsweb
Footnote.com ($10 off membership if you sign up through the Olive Tree Genealogy site until Aug 14, 2007!)

The specifics:
Maryland Historical Society
Garrett County, Maryland Genealogy
Marion County, West Virginia Genealogy

Hope this helps!