Sony could release firmware 2.36, 2.37, 2.38, and 2.39. But in reality, Sony never said Firmware 2.4 is coming soon, all they said was sometime this summer. Summer starts June 21st and ends in late September. If someone feels Sony is only releasing these minor firmware updates to annoy us, they are mistaken (I think their might need to be a firmware update because a few games I recently got (mostly Commando 3) is having series network issues that caused me to have to manually power my PS3 off from the back. Also, a firmware update might fix the issue there might be with some with a PSN Card.
Sony themselves never gave a date for firmware 2.4, and those complaining about Sony disappointing them, can only blame themselves since Sony NEVER gave a date over Firmware 2.4 and is staying quiet.
However, the guy who said this, is not someone I trust (He was wrong about 2.0).
Let's just say, I doubt even Sony themselves know what will come in Firmware 2.4. I believe they want to get certain features working in it, but there's no guarantee they will all make it. Why announce something when you aren't sure either.