If you were to log in, you'd be able to get more information on your fellow community member.
Although not specifically stated, the implication of "opensource" is that it also be popular. While I am very impressed with the technology and acomplishments with the ACS system, I fear students will be learning specfic technologies which are not in wide use. Rather, I suggest other more popular mainstream and rapidly advancing "TRUE" opensource technologies be considered. For example, the relatively new PHP scripting tool has recently topped the one million installion mark on worldwide Apache servers. Based on its relative youth, this milestone of achievement should be indication of its skyrocket growth in popularity. This tool interfaces with many database backends but the two most popular are MYSQL (for extreme performance)and PostgreSQL for transaction suppport. Visit http://www.php.net for more info.