Bio have recently released 2 new gels....Flexi-gel and UV gel. Flexi-gel is a more flexible version of S-gel, and UV is a high shine top coat (no strength at all - like sealer only thinner and higher shine). Sculpture gel is the older gel we used for Free Edge's before FE gel was released, but it builds wonderfully and is a great base gel, so many of use still use it under colour for structure.
The Bio manual will undubtedly be updated to reflect the new gels but until then, no there isn't realy anywhere to 'read up'. I will try and do a sheet this week and post it as a tutorial, if that helps! I have recently posted on use of Exec Base, so you may find that useful.
Thanks for the comments on my daughter....I'm very proud of her as she is very special to me! I often post a few pictures here as many geeks like to see her. She went through an awful battle for her life when she was born, and many of them were so wonderfully supportive to us during that time, and have adopted her to become geeky aunties! (The whole story is back in my blog somewhere!)
Good luck with Bio....happy to help if I can x