I did the Guadalupe trip last October on the Solmar V and I'm going back again this year, same boat. I believe they are nearly sold out for September and October, but I've got a couple of spots open on my trip in early Oct. The Solmar V does have the permit to chum, because the way I understand it, they are grandfathered in to old laws (requirements?) because they have kept up to date with the environmental impact studies every year to satisfy the requirements of the permit. None of the other boats have done this, so they are not allowed to chum.
Last year there were times where we had up to five great whites behind the boat at the same time, and lots of the big females that come later in the season. They also have surface and submersible cages. When Luis is wrangling, is when the shark action is in full force at the surface. I got the best shots there and people who were not in the cages were hanging over the rails with their cameras in continuous shooting mode.
The boat is great, food is fantastic, the crew is the most experienced in Baja, and is very friendly. Here's a little slide show from the trip:
http://www.youtube.com/watch?v=lcS6FBoN2GQI highly recommend this trip.
Bonnie