... critical for all 32 teams. It gives them an opportunity to evaluate talent, identify strengths and weaknesses, and experiment with new tactics. 

In Sunday's match-up between the San Francisco 49ers and Minnesota Vikings, there is a lot of hype

For the San Francisco 49ers, a team with playoff aspirations, the 2010 NFL preseason will be especially important as there are several different areas they need to sort out and improve on. 

More importantly, their match-up against the Minnesota Vikings this Sunday is full of hype as it is also the return of Brett Favre. 

Therefore, here are the five most important things to keep an eye out for.

Note: I've stuck to only the offensive side of the ball in this slidesho...

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