I remember using Freenode early on when I discovered open source. It was a fantastic vibrant place with hackers all over the place. openprojects, lilo, great...
Unfortunately, maybe it's got too big. The atmosphere has changed for the worse IMHO. In my opinion, the staff no longer represent the community.
Today, they put their own ideals ahead of their users. Their objections to Mibbit have been
* It's not open source
* It makes money
The 'abuse' reason I believe is a red herring. Abuse is easy enough to deal with, and them operating their own web client won't change how often people abuse using a web client. In fact their own web client is less secure than mibbit in terms of preventing abuse.So, IMHO, a sad day for Freenode and all that they used to represent, but an opportunity to create a new haven for hackers.