The OBFT Hardfork occurred about 45 minutes ago (21:44:51 UTC) and so far seems to have gone smoothly.
Its important to note that this hardfork is simply a network upgrade, not a chain split that results in two distinct tokens after the fork.
The need for this OBFT hardfork has been explained elsewhere, eg OBFT Hard Fork on Cardano Byron Testnet
Update: I should also note that the code needed to handle OBFT has been in production since May 2019.
yep, kept my cardano-node open and running all the time. not a single glitch or error. well done IOHK!!!
looking forward to the haskell testnet jormungandr node. 
It has been very thoroughly tested (code was basically finished about a year ago) but then bugs were found on testnet and staging that needed to be fixed (bug fixing was done by about May).
There are still a couple more milestones that I would like to see us pass:
Obviously both of these milestones have been passed on the testnet and staging, so it should go off without a hitch.
This is one step closer to decentraiisation on mainnet.
Fantastic news! Thank you very much for sharing this!
Slot 2160 passed… Epoch 177 will be fine too, i know it. 