Has anyone done business with them, if so how quick are they?
It is good to do put feelers out, but Spend Bitcoins has a pretty good track record.
Here's their primary thread.
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http://bitcointalk.org/index.php?topic=8864.0They've been operating since May, 2011 -- meaning they are long in the tooth in the Bitcoin world.
Every exchange has disruptions every once in a while, but depositing cash and getting bitcoins in exchange is a pretty straightforward practice for them.
They aren't the only method though, but for what you need their services should do just fine.
Here's a full list of exchange options:
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http://en.bitcoin.it/wiki/Buying_bitcoins