You can set custom signatures per email account in the settings menu.
I have done that to differentiate personal email, work email, freelance, and other dedicated emails
I'm looking at looking...I only see one signature menu with no option to assign it to an email. And within the specific email account settings, there is no signature option.
Hmm.. I could have sworn I did this before on my 3g, but looking at it now, there is only the master signature and no individual account signatures.
I'll update here if I figure it out
I want this too.
I have a signature that I use for my work account.
I would like to use a different sig for my personal account.
Also, I would like the option to add an image to my sig.