So, really, stardock. After all this time, you can't put in a simple routine that calls windows 7 systray app and displays windows 7 systray? Winstep does it, for FREE. You're not worth the money. why buy any other products from you? Are they going to be the same crap implementation of a promised option? Your multi-tray approach is kludgy, the kind of hack you'd find back on windows 98. Sad.
Wow! Cool down. 
As the developer of Nexus, I can tell you straight away that personally I prefer to show all the system tray icons in the dock. However, Nexus does give you a choice: you can either show only the visible icons in the dock (and display the 'hidden' ones in the Windows 7 own pop-up tray) or show them all in the dock, just like ObjectDock does (Nexus also allows you to show them as 16x16 icons in grouped mode).
Showing them all in a dock is technically superior, so you are shooting down ObjectDock for something that it is actually doing right. Furthermore, depending on a call to Microsoft code is always a gamble, since that particular functionality might be non-existent in a future version of Windows.
As for the systray support being in the free version of Nexus, you seem to be ignoring the fact that both Winstep and Stardock are businesses! The *only* reason I made the system tray available in the free version of Nexus, instead of it just being available in Nexus Ultimate like Stardock does for ObjectDock Plus, was because Nexus was a newcomer into a market already saturated with free docks and the free version needed to differentiate itself from what was already there.
This was a good decision in terms of marketing, but business wise it was a *terrible* decision, since it is one less factor pushing you to purchase Nexus Ultimate. Stardock is actually doing the right thing from a business perspective. 
Hope you have nothing against us thinking from a business perspective, by the way, otherwise just look at what happened to all the free docks not backed by a commercial side: they are all dead or in limbo (RocketDock's last update was, what, 3-4 years ago?), while Nexus and ObjectDock are still very much alive and kicking.
As for fans and grids (Stacks), you can always use Cris'n'Softs stand alone Stacks with the free version of Nexus. A native Stacks docklet is an upcoming feature, but you will only find it in Nexus Ultimate when it does get implemented, and not in the free version. Nexus Ultimate's existing support for multi-level sub-docks is actually functionally superior to Stacks, but I understand how it just doesn't have the 'flair' that Stacks has.