There are lot of merchandise available with "Jai Ho" on it.
Recently I read some party was organized with Jai Ho Theme.
Also their were Holi colors with Jai Ho Name on it. And yes, you can also buy the t-shirts at http://itemraja.com
well oh well...that's not it here are two Jai Ho versions:
1. The Pussycat Dolls - Jai Ho (You Are My Destiny)
2. Congress buys Jai Ho rights for $200000