Top 10 best tips mods when setting up a new vBulletin v4.x Publ.&Mob-suite?

[SweDev]

Hi All :-)
I'm a newbie vB here but not to forums. Have runned several forums over the years on different software (like phpBB etc). But this time I think I'm going to buy, today actually, the vBulletin 4.x + Publishing + Mobile suite, since I think it's the most suited and has the most updated functionality (mobile access is a must for one) for my current and upcoming needs. I'm going to set this up on a Mac OSX Server w Lion (OSX 10.7.1) on our webhotel.

Some Q:s;
- Latest version?
- Any in-built update features or is it manually every time?
- Top 10 tips / mods or "must have's"?
- Setting up vB to charge members for payment / month or /year?
- Creating an private access forum w sub forums and private blogs, articles, pages etc? (Setting up a private developers forum)
- Any e-commerse available (even from 3rd party)?
- Best practice w connecting vBulletin w Facebook, Twitter & YouTube?

Happy for any tips, pointers, links, experiences that you wanna share to help me set this up quickly this week - THANKS!