ezBoard continues to get bigger. Here's the scoop from Vanchau in response to a question from Jason Jones:

Ezboard has well over 10 million registered members and runs on 150 servers .. All Smalltalk.. And the technology improves constantly... We have built some pretty cool stuff using a basic image and BOSS files as our flat file database

Well, I guess the BOSS file back end for this blog isn't so unreasonable ;-)