Marley and Deborah, yes, exactly what Claudia said... and if you feel like it needs it, you might need to do 2 conditioner shampoos at once. apply, scrub, rinse, repeat.
I'm on day 11 of no-poo and I'm shocked at how great my hair feels. I also haven't used any product since Sunday, which I think is helping. I can't say I'm planning to go completely product free. It's just been a down week and I haven't had the need to get all gussied up, so it's been nice to give my hair a break from the daily pre-blow dry products.
BA- I've been doing exactly what you're doing for the past several months.... shampooing once a week. I definitely felt better about my hair, but decided to see if I could extend even longer between shampooing and see how my hair reacted. So far I'm pleased.