Form validation after a redirect

[eluser]djmccormick[/eluser]
I'm wondering if anyone has any advice on the possibility of performing form validation then redirecting the user back to the form page if the form validation fails. Basically I'd like to maintain the state of the form validation after a redirect.

I realize I could just load a view within my processing function, but I'd like to do a redirect for two reasons: URL consistency and to prevent accidental double submissions. Any tips?

Thanks in advance!