I'm not a big fan of Symbian. I had to code a J2ME XMPP client for Series 60 handsets.
The incompatibilities between models and vendors is imho far worse than any browser used to be... But to be fair, I'm not sure if this is Symbian's or the manufacturer of the handset's fault.
Symbian is one of my favourite UK companies, having been spawned off from Psion (I have a battered 3c).