My kid is only 3 and is down to accidents when he is not feeling well and at night, but, even as a father, I've learned dearly about the pull-ups (Why should I bolt for the bathroom when I can do it right here with no mess?) and using potty toilets with all the bells and whistles. We were set back for weeks when we bought a potty that did all the singing and lights when it was used. Kid saw it as a nice toy and never used it for its intended purpose.
DW is still adamant about using "training" underwear during the day and pull-ups overnight, but I'm trying to convince her that it's terribly hindering DS's progress. I think one member of her family who used this training method was still wearing pull-ups going into adolescence because he became a bed wetter!
We have to remember that cleaning up messes is part of being a parent. You don't put your 400-thread count Egyptian cotton Winnie the Pooh sheets on the bed until he's trained. Until then, use the 5-dollar Wal-Mart sheets that can meet File 13 if heavily soiled, ditch the pull-ups, and put the kid on some regular underwear!
...now if I can just stand up and tell DW that without getting my legs broken...