Dang. Breaking news about the coming huge update (including Sniper unlockables) and I’m off in la-la land. I R NUB LOL. Oh well. I found this most intriguing in the TF2 blog post:
In addition, we’ve got another update in the works that should be done before the Sniper, and that one will include some new content for all classes. [emphasis mine]
Hopefully they’ll show the Engy some love.