I've noticed a good wildshape form when Beast shape III becomes avaible: the Aranea (it's a Medium magical beast).
You gain Darkvision, low-light vision, climb speed, a bite attack with Str Poison, and can do the web attack (in fact, I think it's the only way for a normal druid)
One could also assume you can speak normally in this form, since araneas are arcane spellcasters.
What do you think?
