No, I'm sorry to say that the old signatures are gone, at least for now. As a workaround, you could use a notepad file to save what you'd like for signature text and paste it into each post. Not ideal by any means, but might be useful.
If you’d like to find which board went to which Exchange, then check out Find Your Exchange .
You can increase font size by pressing CTRL (or Apple Symbol) and the “+”sign.
Clicking the Discussion Index link on the left sidebar will help you follow Discussions in a more linear fashion.
“Bookmark this Exchange” at the upper right part of the page beneath the house icon, is a good way to find your favorite Exchanges. Once you do that, it will appear under “My Exchanges” on the left navigation bar.
Finally, to watch or follow a discussion, click on “Watch this Discussion,” found beneath each Discussion.