Here are a collection of photos that were taken on a cold night from the Eureka Tower, nearly one year ago.
The Eureka Tower is currently the tallest building in Melbourne, standing at nearly 300m high. Located on the Southbank district close to Melbourne CBD, it forms a distinctive shape on the city skyline. Tickets to the viewing deck on this special occasion were heavily discounted, offering me the opportunity to view the Melbourne cityscape from high above.
Having only been to the observation deck once before during the daytime, I was curious to see how the city looked like through the transition from evening to night. I was already planning to make a trip to the skydeck but the offer of discounted tickets meant that I had to act quickly. 
Long exposure photography was the primary focus of this trip.
All photographs below are not to be reproduced without permission.

Taken from on top the St Kilda roadbridge looking across the Yarra River. On the left is the entertainment district of Southbank, with the fire plume performance from Crown Casino visible. 

The view from the top was amazing. The Melbourne cityscape stretches off into the distance...

The Melbourne Central Business District, looking towards Rialto Tower

Looking east towards Richmond and the south-eastern suburbs. A safety grill was present on the observation deck making it difficult to get an unobstructed image.

Flinders Street Railway Station was once (a very long time ago), the busiest train station in the world. It sits opposite Federation Square, a popular meeting spot in Melbourne and Saint Paul's Cathedral. 

Most of Melbourne's density is clustered around the Central Business district, with most of the city surrounds being low density in nature (with the exception of South Yarra). This results in Melbourne having a metropolitan area that sprawls for a great distance. 

Another view looking east towards Richmond train station and the sporting grounds.

Using the live composite feature that is present on Olympus cameras, I was able to easily capture the light trails from the cars around the Arts Center spire. 

The highway interchange...

This is one of the many visual aids that the skydeck has to help visitors locate prominant landmarks on the ground. 

Conclusion:
The Eureka Tower skydeck brought some very good views of the Melbourne cityscape and for the best experience, should be visited at night. Unfortunately, it is not entirely photographer-friendly. The dark tinted glass meant that a longer exposure time was sometimes needed to get a correct light amount and animated displays within the observation deck meant that reflections off the windows were a real problem. A tripod was allowed to be taken up onto the observation deck which was greatly appreciated.
However, the photographic opportunities meant that these problems were forgiven and I will be sure to visit again in the near future!