I've read that in HBase there is a recommended limit on key lengths because
they're passed around quite a bit. Is the same true of accumulo?  Are there
any recommendations in this regard?

NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB