Among the features in the new version are

automatic line breaks (switchable)
posting preview
blue clicky maker
paged view for long threads
printer-friendly view of threads
sort descending (for each thread)
"Filter out" option on forum main page
Permathreads appear in a dropdown list so take up less screen area
display of number of PMs on most (if not all) pages
delete or archive multiple PMs in one Go
list all PMs from a certain sender
list all PMs you sent to a certain recipient
search in your PMs


This list does not claim to be complete...

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I'll verify that this list is correct. My favorite new feature is the nifty cross-indexing that Jeff added recently.
-Joe Offer-