The problem with the BF MoogerFooger plug that has an envelope follower is that it's preceded by a ring-modulator or filter (I can't remember exactly which plug-in has it). It's similar to Digi's D-Fi Sci-Fi plug-in....envelope follower, but it's being applied to a ring-modulated track. I just want a plain Envelope Follower. Why? To do some wacky cool things with it.
I'll probably invest in DUY's DSPider or SynthSpider. When working with different producers (that aren't too particularily fluent with Pro Tools and it's plug-ins), I've noticed that there are quite a few FX that can't be found as TDM/RTAS plug-ins. One set of plug-ins I'd like to see as a TDM/RTAS are the Digi D-FX ones. At least SoundToys is filling the gap of the "missing plug-ins."