Hi there! My 2 year-old has been type 1 for 1.5 years now. We did shots, Novolog and Lantus for one year and have been on the Animas Ping for over 6 months now. She is only 28 pounds so the OMnipod for us was not an option b/c with her little body, the pod was too big for her, and I didn't like that big of a device having to adhere to her skin.
Even though the Animas pump indeed has tubing, the tubing is not that big of a deal at all. Plus, we tuck it away under her clothes and never have to get to it b/c the Animas Ping is just like the Omnipod in the sense that your blood sugar meter IS your remote control for the pump. So, it speaks to the pump and you don't ever have to push buttons throughout the day on the pump itself. So, your son could simply tuck it away, or wear it under his t-shirt on a soft little belt pouch, very discreetly, and the only thing that is actually stuck to his skin is the tiny flat quarter-size little port. The port or infusion set we use is painless. We use the "Inset." We change them out every 3 days and we only put them at the top of her bottom (below her waist where there's a little fat). She never even flinches. My 5 year-old daughter that often gets jealous of my daughter's diabetes (the attention she gets) -- she often wants to have a "diabetes sticker" too, and doesn't think the ports hurt at all. Of course we don't hook anything up to it, it just makes her feel a part of the attention.
Anyway, Animas is a great company, a great pump, www.animascorp.com and the Ping is fantastic. The fact that your blood sugar meter is also the remote is a huge benefit and allows you to administer little bits or lots of insulin here and there throughout the day depending on carb amount and situation.
The biggest benefit to the pump is the ability to customize basal rates, however. You can never customize your Lantus to really match his physiologic needs like a pump can do. The background basal can be sped up, slowed down, turned off if need, be, etc. You can have a program for school days, weekend days, days when he has lots of after school activities, whatever. Basal customizing is so great. And in addition, you can give little bits of of insulin here and there all the time, more like a normal pancreas.
Good luck in your search!