I have just finished creating a working set of Rails 3 compatible
generators for RSpec.
Also available from gemcutter under the same name: rspec_rails3_gen
They work pretty well, except for the hooks functionality which still
needs some work
hook_for :model, :scaffold, …
I hope to add hook support/integration real soon
At least this is a start… but perhaps there are already rspec
generators for rails 3 out there?