In 2009, I was tasked with the creation of a new donation system for American Cancer Society's Relay For Life of Second Life. The 2010 system was very robust and fast with new features, one being the real time updates of team totals. To accomplish this, I created a Hub and Spoke network communicating to the kiosks from a centralized database using the LSL HTTP server method.
I believe my method to be very fast, stable and scalable. I have detailed how I accomplished it in the below paper.
Networked Communication of Second Life® Objects using LSL, php, and MySQL.