Well to start off, check out Yehoodi Radio:
http://www.yehoodi.com/show/radio
It's swing music selected by swing dancers!
You should also check out this Podcast:
http://www.yehoodi.com/show/heymisterjesse
Also swing music for swing dancing.
If you want to talk about, or read other people opinions on, swing music, then is is the best website:
http://www.swingdjs.com
You can also download original swing music for free on this website:
http://www.jazz-on-line.com
They are digital copies taken off of 78 records. There's a good collection on there. Use their search feature
There's also lots of general online services for online music such as Pandora, Spotify, Grooveshark, etc. But you also have to know where to start.
I'll recommend you start with the great big band leaders:
Count Basie
Benny Goodman
Artie Shaw
Chick Webb
Duke Ellington
Cab Calloway
Tommy Dorsey
Jimmy Dorsey
Jimmie Lunceford
Charlie Barnet
Earl Hines
Woody Herman
Fletcher Henderson
Johnny Hodges
Kay Kyser
Lionel Hampton
Lucky Millinder
(just to name a few)
You can also check out some small combo swing bands like:
Nat King Cole Trio
Cats and the Fiddle
The Three Peppers
Benny Goodman Sextet
Fats Waller
(etc.)
If you want something Modern with a classic swing sound, check out these artists:
Jonathan Stout and His Campus Five
Glenn Crytzer and his Syncopators
George Gee Big Band
Bill Elliot Swing Orchestra
Mora's Modern Rhythmists
Mora's Modern Swingtet
Solomon Douglas Swingtet
Pete Jacob's Wartime Radio Review
Anyway, I hope that helps! I hope you also take up swing dancing as well, since you like the music so much. :-)