If you like Django, then in addition to the Hotclub UK site, you might like to look at these:

Django Montreal
Guitare jazz manouche (English despite its name)

and if you don't mind French sites, these are both good:

Gadjo drom, jazz manouche
About Django

(The last one might be bilingual - it has english on the enter screen, but I've only looked at it in French).

Several of these have introductions to the Django style with exercises and audio examples. (They also have lots of information, videos, discography etc)

Mick