hey twostep,
I'm a Deadhead. Used to be a hippie, used to follow the Grateful Dead around the country, seen well over 100 shows. I also collect their live shows and live recordings of lots of bands. I'm no longer a hippie but I still love the music of the Dead and I love what the guys who are still alive are still doing today (Furthur is the name of their band.)
I'm not a huge phan of Phish but I dig Dave Matthews. Also love the Allman Brothers band and can easily easily easily get into almost any band that jams out a song for 8 or 12 or 20 minutes. That's amazing music!!!
But now I'm also a Christian. To me that means listening to Christian music more than secular music. Musically I tend to have an open mind so I can enjoy what's on the radio -- Jeremy Camp, Casting Crowns, Switchfoot, Red, Hawk Nelson, Tenth Avenue North, Needtobreathe, Sanctus Real, Skillet, Kutless, etc, etc.
If there are Christian jam bands I would give them a try . . . but I have no clue if such a thing exists. You're right, a lot of Christian music sounds the same. But I don't let that stop me from listening to it. Because of what it's about, it's better music. Period. The Grateful Dead might be 75,000 times better than Third Day musically, but Third Day is about God!! Like I said, with an open mind I can dig Christian stuff. It's not bad. Some of it I simply can't tolerate, like death metal or hip hop or something too light and fluffy that you're great grandmother would say, "Oh, that's pleasant." But what's on
WAY-FM and
Air1 I can enjoy even though it's not anything remotely close to jamming.
And then sometimes I'll play some Dead. Or some Allmans. Or Gov't Mule. Or Clapton or Blues Traveler or the Blues Brothers or The Stones of Dave Matthews Band or what-have-you. What I like is vast, rooted primarily in the Dead and stuff like that as well as classics such as Zep and Bob Marley and jazz, as well. But that (secular) music is not what's in my ears most of the time as a Christian. I accept that. I know it's the right thing in God's eyes. 15 years ago I wouldn't be caught dead listening to Christian music (when I wasn't a Christian) but now I wouldn't feel right not listening to it most of the time. While a Christian is supposed to cast the old aside, every now and then I need me some jamming compared to 3 to 5 minute songs. And if you stay grounded in your faith, it can be alright to indulge a little.
I ramble so sorry for the long answer to your question. No Christian jam bands that I know of. I hate to sound commercialistic but I'm not sure there's a market for it. Outside of Christianity, there is/was a market for Phish & The Dead as they used to/still sell out everywhere they go. My belief is your ordinary average Christian is a different breed of music lover than the type who loves a jam band. Musically they are just two separate worlds.