Only the large GM car here (2008+ Commodore) has the unlock twice feature as far as I'm aware.
My '04 MSM and the SP23 are unlock all doors with one "click" on the unlock, but the trunk release on the key fob for the '04 MSM kicks ass in my opinion!
Hmm, interesting. What exactly about the fob's trunk release makes you say it 'kicks ass?' I guess the one thing that's maybe a tad unique - That 'CLUNK' when you hit the release it pretty daggone loud. So if you're far away, it helps to locate your car. The range seems fairly decent too. Other than that, it seems pretty ordinary.
Many other cars have even nicer set ups - My Infiniti I30 opens up about halfway when you hit the button. A big help when you're struggling to hold a pair of dead midget hookers you need to stash in the trunk quickly.