I was blissful unaware of this page so found it rather fascinating to check out some of the ideas that people were suggesting. While the page is clearly IBM Software focused, you can in fact suggest improvements to IBM’s SVC and Storwize V7000 products. Just choose the Tivoli Brand and then the Storage Product family.
To use the site you will need an IBM ID which you can create quite easily here.
Some good examples of RFEs you could vote for include:
Search for RFEs here.
For further reading about the site checkout Scott Laninghams blog here (which contains a tutorial on how to submit requests) and Daryl Pereira’s blog here (which has a presentation on the RFE Community).