Just remember though, if you choose this setup and one of your drives goes bad on you, you lose data from BOTH drives. Making a spanned drive is a similar configuration, but data on one drive will only be made inaccessible when the other fails, it can be recovered.
more info from Microsoft:
http://support.microsoft.com/kb/314343
• A spanned volume is created from free disk space that is linked together from multiple disks. You can extend a spanned volume onto a maximum of 32 disks. A spanned volume cannot be mirrored and is not fault-tolerant.
• A striped volume is a volume whose data is interleaved across two or more physical disks. The data on this type of volume is allocated alternately and evenly to each of the physical disks. A striped volume cannot be mirrored or extended and is not fault-tolerant. Striping is also known as RAID-0.