Just a quick reminder that starting on July 9th there will be a special Harry Potter art exhibition featuring art from the likes of Mary GrandPre (US Book Cover artist) and Drew Struzan (illustrator of the original HP movie posters) among others.  On the 9th there will be an opening reception from 7pm-11pm:

During the opening reception attendees who come in costume will receive a free door prize and be divided into schools for trivia and other games. There will also be complimentary butterbeer, mystery flavored jelly bellies, and other treats.

For full information on the event visit their blog.

UPDATE: here is some more information Nucleus sent over:

On July 9th, one week before the premiere of Harry Potter and the Deathly Hallows: Part II, we will be presenting a tribute art exhibition in celebration of the many adventures of Harry Potter and friends. The tribute features over 50 artists and over 100 original tribute pieces. Attendees of the opening reception will have a chance to win posters, artwork, advanced screening tickets and lots more!

Opening Reception: Saturday – July 9. 2011
Open to all!

Artists in attendance.
Hourly Raffle Giveaways and contests.
Butterbeer.
Mystery Jelly Bellies tasting.
Free admission and souvenir button if dressed in costume.

Exhibit Runs July 9 – August 1, 2011

Online Event Page: http://www.gallerynucleus.com/gallery/exhibition/244
Exclusive Tribute Blog: http://www.gallerynucleus.com/blog/harrypotter