Will vacuum sealing an open bottle of wine make it like it was never opened?
The only way to get "like it was never opened" is not to open it.  But storing an opened wine bottle isn't a new question.  There are a whole range of products, which will keep the wine varying lengths of time.  From simple hand-vacuum pumps which can hold a day or two, to as-decanted nitrogen or argon replacement systems, which can add a week or two.

See http://www.wineenthusiast.com/serve-preserve/wine-preservation.asp?AfID=CJ for some product examples.  The longest holding I've personally played with is something like http://www.wineenthusiast.com/nitrotap-single-bottle-wine-service-preservation-system.asp, which prevents oxygen ever getting into the bottle.  However, even the bit of air between pulling the cork and inserting the spigot causes the wine to degrade within a week or two.

If you're looking to set up a bar, the nitrogen replacement systems can be found in multi-spigot configurations.  So you can have 4 or 8 bottles "open" at a time.