I pretty much update two days a week- Mondays and Fridays... or at least I try to. Sometimes life kinda get's in the way. Usually if I have to delay an update, though, I will just post the comic on the next deadline. If I can't get Monday's comic up on Monday, I'll just wait until Friday to post it. I guess I just really like consistency.
I'm hoping to possibly add some elements of animation to my comic, as well. How that will effect my update schedule, I have no damn clue.
Which begs an additional question I am going to throw out there- for anyone who does added elements of animation in your comic, how much does that effect your update schedule?