Hi:) I went through something similar to this with my oldest son who is now 6. I found that the clothing he wore made a huge difference. My mother told me to totally forget about jeans, rompers, or other types of "difficult" clothing during potty training. Even though I didn't like that advise, it helped to a large degree. Toddlers, as I'm sure you know:) have major issues with independence and most try to do everything themselves. My son became frustrated when he could not get his pants down because he still needed mommy to help him go to the potty. I stuck with elastic waist sweatpants and athletic type pants with the piping down the sides.
For this reason also, I have been told by several parents that they potty train in the summer and warm months. My son was quite resistant at times to potty training, but when I told him he could pee in the yard that is what really got him excited about it!!! LOL!!!! When we were completely set for potty training, I bought some training pants--not the disposible pull ups, but they are specifically for toddlers and feel like cloth diapers but have the elastic cover built in. These helped a LOT because I found that my son didn't realize he was wet when he wore pull ups. I'm not sure how well those new "Feel and Learn" ones work because they were not around when my son was at that stage. For the first week or so everytime my son used the potty (inside the house) he got to call grandma or grandaddy or whomever he wanted and tell them how he just used the potty all by himself. This was great motivation!! I also tried really hard to hide any irritability I had about accidents and smiled as I cleaned poo off the floor (ICK)...A positive attitude and no pressure atmosphere made my son believe that it was all up to him, his decisions, etc....
My mother's advice to me was-"switch him to underwear and don't go back"....once we got these "trainer" pants I never ever put diapers on him during the day again, only one at night when he slept. That first week was absolute hell (I do not recommend potty training during any stressful times like holidays or when parents are stressed out)...try to stay home as much as you can during the first week or so. Also, caregivers like daycare need to do exactly what you are doing at home. Expect many accidents!!!
If you have tried all this stuff already and after, say, 10 days or so he is still not catching on, then maybe he is just not ready yet:)
I hope this helps...I swear I would rather change diapers ANYday then deal with potty training!! but it is such an exciting time and a milestone towards independence!! But I have a 2 year old that is starting to show a little interest so I'm sure after the holidays I will be posting questions for you!!:)