After contributing some code (PrettyFaces) and having a discussion with Lincoln I've joined a seam-dev mailing list. My plan is to help Lincoln with Seam faces module (maybe with other modules to) - I hope to find time for helping. 
well I was using Seam from version 1.2 to 2.2.x - so I'm familiar with seam. 

I checked out seam-faces module about two weeks ago and compiled it with no problem. but last week, after an update (svn up) it didn't compile anymore. After having a discussion with Lincoln yesterday, I started from beginning. So I removed a org/jboss/seam folder from m2 repo, followed the instruction on http://seamframework.org/Seam3/CheckOutAndBuildSeam:
mkdir seam-trunk
cd seam-trunk
svn co http://anonsvn.jboss.org/repos/seam/build/trunk build
svn co http://anonsvn.jboss.org/repos/seam/dist/trunk dist
svn co http://anonsvn.jboss.org/repos/seam/modules/faces/trunk faces
cd build/parent
mvn install
cd ../..
cd dist
mvn install
cd ..
cd faces
mvn install
as first I got an error:
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Failed to resolve artifact.

Missing:
----------
1) org.glassfish:javax.servlet:jar:3.0

  Try downloading the file manually from the project website.

  Then, install it using the command: 
      mvn install:install-file -DgroupId=org.glassfish -DartifactId=javax.servlet -Dversion=3.0 -Dpackaging=jar -Dfile=/path/to/file

  Alternatively, if you host your own repository you can deploy the file there: 
      mvn deploy:deploy-file -DgroupId=org.glassfish -DartifactId=javax.servlet -Dversion=3.0 -Dpackaging=jar -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id]

  Path to dependency: 
   1) org.jboss.seam.faces:seam-faces:jar:3.0.0-SNAPSHOT
   2) org.glassfish:javax.servlet:jar:3.0

----------
1 required artifact is missing.

for artifact: 
  org.jboss.seam.faces:seam-faces:jar:3.0.0-SNAPSHOT

so I added following code to the .m2/settings.xml:
                <repository>
                    <id>glassfish</id>
                    <url>http://download.java.net/maven/glassfish</url>
                    <releases>
                        <enabled>true</enabled>
                    </releases>
                    <snapshots>
                        <enabled>false</enabled>
                    </snapshots>
                </repository>

now every time i do "mvn install" i get an error: 

-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running org.jboss.seam.faces.environment.FacesContextProducerTest
SLF4J: The requested version 1.5.9 by your slf4j binding is not compatible with [1.5.5, 1.5.6, 1.5.7, 1.5.8, 1.5.9.RC1, 1.5.10]
SLF4J: See http://www.slf4j.org/codes.html#version_mismatch for further details.
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.444 sec <<< FAILURE!
Running org.jboss.seam.faces.context.FacesAnnotationsAdapterExtensionTest
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.087 sec <<< FAILURE!
Running org.jboss.seam.faces.util.AnnotationsTest
Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.036 sec
Running org.jboss.seam.faces.event.SystemEventBridgeTest
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.117 sec <<< FAILURE!
Running org.jboss.seam.faces.context.conversation.ConversationBoundaryInterceptorTest
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.065 sec <<< FAILURE!
Running org.jboss.seam.faces.event.PhaseEventBridgeTest
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.063 sec <<< FAILURE!
Running org.jboss.seam.faces.environment.ExternalContextProducerTest
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.059 sec <<< FAILURE!

Results :

Tests in error: 
  org.jboss.seam.faces.environment.FacesContextProducerTest
  org.jboss.seam.faces.context.FacesAnnotationsAdapterExtensionTest
  org.jboss.seam.faces.event.SystemEventBridgeTest
  org.jboss.seam.faces.context.conversation.ConversationBoundaryInterceptorTest
  org.jboss.seam.faces.event.PhaseEventBridgeTest
  org.jboss.seam.faces.environment.ExternalContextProducerTest

Tests run: 9, Failures: 0, Errors: 6, Skipped: 0

I've attached a file {faces-module}/impl/target/surefire-reports/org.jboss.seam.faces.context.conversation.ConversationBoundaryInterceptorTest.txt with a report. 

Did anyone else had similar problems?

Uros