'Selena the Last Concert Live' has 13 live tracks including the Disco Medley, 'El chico del apartmento 512', 'No me queda mas' and 'Como la flor'.

Selena the Last Concert Live at Amazon.com
'Selena y Sus Inicios (the Early Years) Volume 1' has 10 of Selena's earlier tracks.

Selena y Sus Inicios (The early years) Volume 1' at Amazon.com

Since 'Selena y Sus Inicios' is a volume1 i guess we can be expecting another one sometime in the (hopefully not too distant) future!! Keep coming back to the News section as i will update whenever i can!