Hi!
Yep, I can confirm that the behaviour with Logic 8 is the same, I was playing with it last night. Nice product, shame about this missing feature. 
We’ve created our noatikl generative music engine with Juce - more info from http://www.intermorphic.com - and the noatikl VSTi works brilliantly as a MIDI-emitting plug-in for Cubase and Sonar.
With Logic, our users have to use the standalone version of noatikl (also created with Juce, of course!), sending MIDI data to Logic through IAC ports/MIDI Pipe. This does work well, and has been rock-solid, but Plug-ins would be a neater approach IMO.
I’d love to be able to use a MIDI -emitting plug-in within Logic, and our users would find that tremendous too! Shame that Logic doesn’t support VSTis, that seems like a really rough deal for Logic users IMO… anyways, here’s looking-forward to MIDI-emitting Audio Units in Logic!
All the best folks!
Pete
P.S. noatikl and liptikl finally due for release within the next 2 weeks - touch wood!