Nominating is easy. Just leave a comment as you normally would with what you're nominating for this category (remember, comments must be validated!). You don’t have to include your reasons for nominating it or any of that stuff, just leaving the name is fine.
Limit your nominations only to corporate, device-related, or otherwise, that occurred in 2005.
Also, these blunders only need to be nominated once to be in the running, so if you’re planning on suggesting something, please make a quick scan to see if someone’s already beat you to it (i.e., please don't nominate anything more than once!). Thanks!