Hey Diva,
I moved here 4 years ago from Dallas and am loving every minute of it!~ Like some of the others have mentioned, the club/bar scene is excellent here but coming from Austin, this place can be a little slow during the weekdays.
I would suggest a new club called Rain which is located in the Rembrandtplein (across from Escape) and of course you have the others like Jimmy Woo (sometimes a door policy...bullshit), Escape, The Powerzone, Panama, Hotel Arena and maybe even the Paradiso if some good Dj's or bands are playing.
Amsterdam is easy to get around in but the taxi's are a huge scam and very expensive. The 2 main areas where the clubs/bars/coffeeshops are called the Rembrandtplein and Leidseplein.
Check out this site:
http://www.channels.nl/leidseplein.html
As with any city...eXtra party favors are available if you have the right connections....
Email me directly and I can give you some more specific tips or at least point you in the right direction!
daveinamsterdam@hotmail.com
You will have a great time here!
Dave