Indeed.
I confirm that both ``sbt assembly`` and ``mvn package``produce a fat jar in which the manifest contains the version.

```
unzip -p assembly/target/scala-2.10/spark-assembly-1.0.0-SNAPSHOT-hadoop2.0.0-mr1-cdh4.4.0.jar META-INF/MANIFEST.MF
```
outputs:
```
Implementation-Vendor: The Apache Software Foundation
Implementation-Title: Spark Project Core
Implementation-Version: 1.0.0-SNAPSHOT
Implementation-Vendor-Id: org.apache.spark
Built-By: ria
Build-Jdk: 1.6.0_27
Specification-Vendor: The Apache Software Foundation
Specification-Title: Spark Project Core
Created-By: Apache Maven 3.0.4
Specification-Version: 1.0.0-SNAPSHOT
Archiver-Version: Plexus Archiver
```
in both cases