Hi, Michael, apologies for the delay in responding.
We at Netapp have several offerings that provide starting knowledge for storage administration of NetApp solutions, available via instructor-led or web-based/self-paced.
The customer facing offerings are found here:
http://now.netapp.com/NOW/products/education/public/learning_maps/lm_customer.html
I should take this opportunity to also redirect you to SNIA (Storage Networking Industry Association) for their courses and certification:
http://www.snia.org/home
Within NetApp's own storage training products, the first offering we most often point to is a course called Data ONTAP Fundamentals; 5 days in length. It is the proper starting point. From this class, we can suggest several that are more focussed on deployment of network protocol (NFS/CIFS/SAN) or details of data prtoection or disaster recovery/business continuance.
Our base certification is called NCDA. The preparation and description of tests are found here (as well as information about certification that is targeted more at specilized roles in pre-sales and post sales technical):
http://www.netapp.com/us/services/university/certification.html
Click on "getting started" to see the pyramid of certification offerings.
As most of our solutions include connectivity to other gear, you would be wise to undertake some consumption of training from RedHat, Sun, Microsoft, Cisco, Brocade or others based on the area of specialization that you might desire.
Lastly, it seems that there's a boatload of Storage related books out these days (even a "...for dummies" and as one would expect several IBM Redbooks):
Using SAN and NAS
by Curtis Preston is a good one to consider.Practical Storage Area Networking
by Dan Pollack, looks appropriate from chapter titles and a brief review of topics, though I have not read. Best of luck with this pursuit.
Bruce M