Where was this three weeks ago, when I bought my copy? 
Might still get this for the no-cd aspect (rather than getting no-cd patches from shady sites). I'm guessing the keyboard patch still works with it.
1. Is there any pre-loading menu box like the CD version, or does the game load directly? I'd like to not have a launcher menu when using it with my front end.
2. How easy is it to move from system to system? If my cab PC crashes and I have to reinstall my OS (like I just did), can I just reinstall this program without a problem?
Well, I uninstalled it and loaded it up. Works perfectly without the mess of a DVD check. Nice. I can ebay my DVD version now that I bought the digital download.

1) Yes, there is a pre-loading menu box like the CD version. Bummer! But you can bypass it by setting up a macro in Autohotkey to hit enter automatically.
2) It was pretty easy to move. After it downloaded it uncompressed it. Then it automatically started the setup program. I cancelled it and then searched for the folder it uncompressed into. I actually burned the setup directory to DVD for archival (I copied my reg info into a text file and added that to it before burning). It downloads and uncompresses it to the following folder: C:\documents and settings\(insert user here)\local settings\temp\downloads\SFIV_Setup
I'm pretty sure you can re-install it as long as you have the registration info (reg keycode).
Works great!
D