There you'll find some excellent background information, and cultivation tips. The Asclepiad Page Not flashy or pretentious, just lots of useful information and wonderful pictures. Be sure to check out the article 'Succulent Cultivation,' and if you DO have Stapeliads, 'Cultivation Notes' is a must. Scroll down the list to see if your topic has already been covered. If not, e-mail your question.
Answers are quick and exceptionally helpful.
Besides smaller plants, they also have an impressive list of specimen-size plants available. If you like these links, there are more links available. Used under License.