Post all you want. I feel that you have some tension as a DM, thinking that folks are going to say..."Hold up, I didn't get my turn!" In full on. round for round combat, that may be necessary to wait. But in non-combat situations I'd feel safe assuming that we have some party continuity.
Marching order is more important for that, and we should determine it for, I guess, two situations. Cautiously advancing, waiting to get jumped, and searching room to room. The first would involve a heavy hitter up front, the second, well it's all about Swipe. In situations like this, I really feel for the spellcasters and appreciate their patience.
If you like, I have an article passed on by my LOTR GM concerning "Warring Status". It's pretty much a guideline for absent players to declare how they want their characters to be handled. If we're all mature players (and GM), this is fine, no one cries if you're two squares off, as long as you don't become some sacrificial lamb. So let me know if you want a link or repost of this.
Other than that, I say pick up the pace, mps. In my experience, most will follow in suit.
