There has been no evidence of degradation of someone's Mac's SSD that renders all this crap about no TRIM support. Even if degradation happens it would take a considerably long time of hard use. People need to stop spreading FUD unless you have concrete evidence of a Mac SSD degrading and in need of TRIM.
Sure filling up the drive could be a confounder in regards to caching and other forms of use slowing down the system, but I have definitely seen the ability to reset my SSD as a plus and restoring peak speeds.
Anandtech has some concrete evidence of the effects of no TRIM. If you want to see real objective graphs. Trust me, I have no incentive to spread FUD. http://www.anandtech.com/show/3812/the-ssd-diaries-crucials-realssd-c300/8
Notice that when TRIM is enabled, it actually helps a great deal.
To be fair though, even an SSD at its worse performance is still going to be faster than a hard drive; so, it wouldn't be the end of the world.
Still would you want to have a drive that continually decreased in performance forever? Or would you rather have a way to keep it in its most optimal state?
If you are cool with not having the ability to ever get back to out of the box performance, then enjoy your new computers! No seriously, I wish I could buy one, but I'm still waiting on any definitive way to reflash and/or TRIM the SSD in it. Until then, my Intel X25M is plenty fast.
As far as I remember, according to what I read, Apple's developers were working on TRIM support, but for whatever reason, it hasn't been put into the OS yet. I can only assume 10.7 will have it. I'm too intimidated to email Steve Jobs about it, but I'd fully expect him to respond with something curt like: "not a big deal."