Streetsy
Image gallery of street art.
http://www.streetsy.com/

TIME: Art of the Street Photo Essay
Images and commentaries of artists recreating the urban landscape.
http://www.time.com/time/photoessays/street_art/

Virtual Street Reality
Images of works by the English artist Julian Beever known for his art on the pavements of England, France, Germany, USA, Australia and Belgium.
http://www.rense.com/general67/street.htm

Wikipedia - Street Art
Provides a general description of the art form and a listing of artists.
http://en.wikipedia.org/wiki/Street_art

Wooster Collective
A Celebration of street art, stickers, posters, graffiti and culture jamming.
http://www.woostercollective.com/

Barcelona Street Art
Collection of street art photos with many works by Justin Case, an urban decorator living in Barcelona.
http://www.barcelonastreetart.net/

Dan Witz
Gallery of street art, excerpt from a roundtable discussion on street art, and essays.
http://www.danwitzstreetart.com/

Street Art Workers
Network of printmakers, stencil artists, graffiti writers and designers who use the streets for art and activism. Includes current and past projects.
http://streetartworkers.org/

Invisible made Visible - Urban Street Art
Image collection of urban street art photographed in and around east London.
http://www.invisiblemadevisible.co.uk/

Mind Hacks
Optical street art of Julian Beever.
http://www.mindhacks.com/blog/2005/06/optical_street_art_o.html

The Morning News - Paper Faces, Paper Cities
Pitchaya Sudbanthad talks to the street artist known as Swoon. Includes a gallery of her work.
http://www.themorningnews.org/archives/new_york_new_york/paper_faces_paper_cities.php

The Morning News - Roundtable: Street Art
Pitchaya Sudbanthad discusses some of the legends of the scene and talks about the history of street art, and where it’s headed next.
http://www.themorningnews.org/archives/personalities/roundtable_street_art.php

Grand Rapids Graffiti and Street Art
Graffiti weblog about walls and trains in Grand Rapids, Michigan by local and non-local artists. Includes organization profile, gallery, updates and contact information.
http://www.equalized.org/

Little People
A tiny street art project from London, UK.
http://little-people.blogspot.com/

Banksy
This British street artist with an international reputation shows and explains some of his best work.
http://www.banksy.co.uk/

Heidelberg Project
Outdoor art project on Heidelberg Street, Detroit, partially destroyed by the city, documented by HBO and restored in 1999.
http://www.heidelberg.org/

Global Street Art Democracy | Gimme Street
A community built around users voting on their favorite images.
http://www.gimmestreet.com