6.3.27a and 7.0.8a source releases are now available from ftp://ftp.mysql.com/pub/mysql/download/cluster_telco/
The source releases for MySQL Cluster 6.3.27 and 7.0.8 have been withdrawn so that a bug can be fixed; new versions should be out very soon.
Finally, 7.0.8a was released:
ftp://ftp.mysql.com/pub/mysql/download/cluster_telco/mysql-5.1.37-ndb-7.0.8a/
Regards,
Robert