<p>Modded to be slightly more useful as I wrote the other one while slightly delirious.</p>

There's probably a script for this.  Or maybe drush is the script.  Is all good, some things are done much faster with commandline :)

drush vset maintenance_mode 1 drush cc all drush arb default --destination=../[site]-[date].tar

And if there's updates to be done:

drush up -y

At the end:

drush vset maintenance_mode 0

Think I'm one of the few people on the planet who could have trouble with something as basic as this.

Problem: csv dump of the users table will not import no matter how you tweak the settings.

Solution:

In Drupal 6 you could do it with hook_form_alter()s in template.php or a helpful little module called Node and Comments Form Settings.  With 7...I have no idea, but apparently not quite the way I've done it before. 

I survived the alpha iterations! Learned a bit but didn't end up helping much (or at all really) aside from something like a bug report and confirming a UX issue.  So now we're sitting on beta1 and I feel slightly more confident putting stuff here as from memory the betas are upgradeable.  Alphas are not.