Your MySQL disk space usage is considered part of your overall space usage. Your databases can be as large as your hosting plans available disk space (min 20GB).
This package works well at Dreamhost. In fact, it is one of the packages available in the Dreamhost 'one-click-installs'.
Yes some downtime, but not enough to worry too much about. Normally only a few minutes here and there as servers are rebooted etc.
Pay just [color=#CC0000]$22.40[/color] for 1 year Dreamhost hosting, use promo-code [color=#CC0000]MOJO97[/color]
Save [color=#CC0000]$97[/color] on all 1 and 2 year plans!! (Max saving on monthly plans too!!)