I was in Lisbon for 3 days over Christmas and I had a really an enjoyable time as the weather was just perfect for the whole time I was there. The only downside was the most places were closed because of the public holiday.
Getting from the airport to downtown was a piece of cake as there is a bus outside the airport which will take you there for 3.50 euros (5$) I stayed in a hostel in Rua Augusta which is one of the main pedestrian areas in Lisbon and very close to the sea, however if you do stay in this street please do not buy anything from the cafes and restaurants that you find there as they will rip you off openly and unashamedly (I was charged 2 euros for an hot chocolate which was made with the instant powder)
Lisbon is an easy city to get around on foot and it's really beautiful as it has a small town feeling even though it's quite a big city. If you don't want to walk you can get on one of the historic trams/streetcars, but beware of number 28 as that is robbery central and it is frequented by experienced pickpockets
It was also interesting to see all the people from the ex Portuguese colonies in Africa (Cape Verde,Angola,Mozambique,etc) who decided to make their home in Lisbon
The economic situation as you know it's terrible at the moment in Portugal and it was quite visible in terms of poor people on the streets (which used to be non existent anywhere in western Europe before the crisis)
Lisbon street scene by
Piero Damiani (back home), on Flickr
Lisbon by
Piero Damiani (back home), on Flickr
Lisbon street scene by
Piero Damiani (back home), on Flickr
Lisbon by
Piero Damiani (back home), on Flickr
Lisbon sunset by
Piero Damiani (back home), on Flickr
Lisbon sunset by
Piero Damiani (back home), on Flickr
Rua Augusta at dusk by
Piero Damiani (back home), on Flickr
Lisbon street scene by
Piero Damiani (back home), on Flickr
Carreira No. 28 by
Piero Damiani (back home), on Flickr
Lisbon street scene by
Piero Damiani (back home), on Flickr