Discographies:

Joy Divison Shadowplay an excellent all round site

Here Are The Young Men - The Joy Division Discography - fully illustrated discography for all official releases, including compilation albums. Also has a chronologoical list of recording sessions and tape trading. Page run by Ger Potze.

Social media:

Twitter - Joy Division Central

Twitter - Joy Division & New Order Pics

Facebook - Joy Division Day by Day

Facebook - Joy Division (unofficial)

Newsgroups and Discussion:

Joy Division Central

Manchester and Music

Manchester District Music Archive - Manchester Music

Guitar Tabs

The Gothic Tab Archive - bass and guitar tabs for all Joy Division albums!

Joy Division's guitars

Shergold Guitars - the hand crafted guitars used by Barney and Hooky

Record shops on the web:

Ebay The best for rare and obscure items

Discogs - it's huge and there's lots of Joy Division

MusicStack - not as big as Discogs but still a lot of Joy Division

Joy Division collectors pages:

incubation - site closed 2010. Link accesses last version via the WaybackMachine

Buy live Joy Division photos

Bristol Trinity Hall live photos by Andrew Davis

New Wave Photos - Philippe Carly - lots of photos from Plan K concerts

General Joy Division sites:

Joy Division - The Eternal

In Between Days - This collaborative site provides good coverage of both Joy Division and New Order.

New Order Sites:

NewOrderOnline - Excellent New Order site

New Order Web - A new site for 2012