I've recently signed up for Google Apps because of the email support. I only use the web based gmail client for all my mail. I'd like to have a professional email signature for each email that I send that includes a small image which is the Logo of my company. How can include such an signature with Gmail?
Google recently announced support for rich text in signatures. That means you can now configure the font family, size and color, as well as insert images into the signature. Just go to your gmail settings and you'll find it right there, no need to enable as a lab feature or anything! It's possible it hasn't been expanded to Google Apps for your domain yet, in which case it should be coming pretty soon.
Just to add to that if you have multiple accounts (and hence want multiple signatures) Gmail can now handle this too (I used to have to use 'labs' canned responses to do this). So if you also set up Gmail to automatically respond to the e-mail account the message was originally sent to it means you automatically get the correct signature on your reply. Very nice.