Ant writes "TV.com reports David Eick and Ronald Moore released a statement on Thur., May 31, 2007, stating that they will conclude the show on their own terms. They said it was a creative decision. The show was always planned with a definite beginning, middle and end, unlike many other sci-fi shows and dramas. Sci Fi Channel has accepted the decision.
The news had been foreshadowed this spring through statements from stars Edward James Olmos and Katee Sackhoff. Ronald Moore himself had said that the show was heading into its final act, although he said the final act could be one or two more seasons. Now we know that the final act will last for one season.
The special 2-hr. episode "Razor" starts off the season in November. The first regular episodes of Season 4 will air in early 2008."
Link to Original Source