What is this "Recursively Open all Folders" action you speak of? Have you tried the asterisk (*) key when the focus is on the root folder? This has worked in treeview's since at least Windows 3.1, although it doesn't recursively collapse.

The plugin looks great - thanks for sharing.
One of the easier ways of doing the command prompt (and "Explore here", to open Windows Explorer at a given location) is simply add an external tool that uses this command:

C:\WINDOWS\system32\cmd.exe - Command Prompt here
C:\WINDOWS\explorer.exe - Explore here

and for Cmd, this initial directory:
($(ItemDir))
for Explore, just this argument:
/e,$(ItemDir)

VS macros such as $(ItemDir) give real power to customising VS in a simple way like this :-). Of course the downside of these examples is that you have to have a target file open for them to work :-(.
Great site BTW.

That works really well if you're not as lazy as I am - custom tools show up in the tools menu. I wanted to get that functionality from the context menu so I stuck it in the Add-In. Actually, that's a great complementary solution; put it both places and all bases are covered. Great tip!

For the folks like me who always want a VS.NET command prompt (and really just have no occasion to NOT have one), I posted a registry hack that makes it so cmd.exe always runs vsvars32.bat at startup. It doesn't use the /k command line option, either, so it'll work with the Command Prompt Here power toy as well as my Solvent plugin.

http://www.paraesthesia.com/blog/comments.php?id=604_0_1_0_C

About the recursive +/-
Have you tried selecting the treenode and pressing * on the keyboard;)