OK here goes -- I shall try and make this as short as possible. I run a Rock 'n' Roll Club (Occasionally DJing) and am talking from my own experience and therefore may not generally reflect the views of all

.
Firstly there is quite a difference between what is termed Jive and Rockabilly (depending on who you talk to

)
The "Rock 'n' Roll" genre encompasses all the following 1950s music;
Jive (Any 1950s music suitable for Jiving to)
Rock 'n' Roll (As Jive but specificaly the type of music that most people would think of as Rock 'n' Roll e.g. Little Richard/Jerry Lee Lewis etc.)
Rockabilly (Hillbilly Rock 'n' Roll, generally harder edged and faster than Jive/Rock 'n' Roll making it more difficult but not impossible to dance/Jive to)
Boppers (Music not suitable for Jive but great for the 'Bop')
Strollers (Music around 120 to 146 Beats Per Minute; Lucille by Little Richard for instance is a popular Stroller, played in the main for dancing a rock 'n' roll dance called the 'Stroll')
1950s R&B (When R&B stood for Rythym and Blues

Usually perfect for Jiving to.)
Modern Jive aka LeRoc or Ceroc or even Le Jive are 'modern' interpretations of rock 'n' roll. Modern jivers will dance to swing and modern music e.g. chart stuff of the right speed/tempo. They would rarely dance to rock 'n' roll or rockabilly music because it is generally too fast for their style.
For a good jive compilation, try East Coast Teen Party Vol 1 to about 7 and for a more rockabilly based compilation try 'That'll Flat Git It! Vol 1 to about Vol 16.
Bim Bam Records who have a website would be a good place to start looking for these CDs.
I could go on for ages on what is a huge subject but I did say I would try and keep it short. I would be more than happy to discuss further any of the above.