ISO 2 is intentional: That is the speed you would get if you did a really good job of making your own emulsion with the recipes that float around. It replicates what they were doing in the early 1880s. That is precisely the gap in historical photographic processes that I am filling with these plates.
Storage isn't as big a deal as you would think...mostly because archival storage of glass plate negatives is a problem that the industry has solved long ago.
This is what I use:
http://www.gaylord.com/Photo,-Print-&-Art/Gaylord-Archival®-Blue-Grey-Barrier-Board-Glass-Negative-Storage-System/p/HYB02428
Stores at least 100 plates in their 4x5 box, in envelopes which are great for writing exposure and enlargement notes on.
Storage is actually a really good topic to bring up, so I added a blog post to my website providing the link above.