That's so good to hear. It gets a little interesting trying to cluster when you have a 100Gb database. Is that > 5.1 or >6.0? Have you switched DP over to 5.1 yet, or are you still on 5.0?
MySQL 5.1.6 was the version they introduced disk-based NDB tables for MySQL Cluster. Still running 5.0.xx here, for what I need, I haven't seen anything in 5.1.xx that warrants an upgrade.
I have a full confidence using MySQL. They provide free stuff that can compete with Oracle and MSSQL. Now, I am looking forward to Full Text Indexing feature for InnoDB. I hope I can be relieved to use InnoDB for all of my tables.