Brighthub: "With ]po[, you can have all the functionality of dotProject during the early stages of your business and expand to include other capabilities, if and when you need them." (Michele McDonough begin_of_the_skype_highlightingend_of_the_skype_highlighting)
http://www.brighthub.com/office/project-management/reviews/54701.aspx
ZDNet: "Project Open is an open source project portfolio management solution based out of Europe. The software has attracted a fair following there and is used by a number of professional services firms (e.g., Cambridge Technology Partners). The software is frequently used in an on-premise mode although hosted versions are available from the firm or selected partners. I only had time for a cursory examination but the functionality appears fairly robust for service groups of 20+ people. It’s a PSA/PPM option for those looking at open source solutions." (Brian Summer)
http://blogs.zdnet.com/sommer/?cat=82
Ohloh:"$11,307,985: This calculator estimates how much it would cost to hire a team to write this project from scratch."
http://www.ohloh.net/p/illasme