Quickly on the heels of Google allowing more control over snippets, here comes more control over titles. Vanessa Fox puts it as-
Yesterday we told you that you can use a meta tag to ask us not to use descriptions of your site from the Open Directory Project (ODP) when we generate snippets. Some of you have asked if this meta tag prevents us from using the title from the ODP as well. Yes, this meta tag does apply to both the title and description from the ODP.
Also, as noted in our webmaster help center, you can combine parameters in the meta tag. So, for instance, you could use the following meta tag:
<meta="robots" content="noodp, noarchive">