Is there any way to have the Screen Sharing app in Snow Leopard to remember the last connected host? I'm wondering if there is an easier way. Currently, I launch Screen Sharing app, and a window appears asking for a host to connect to. I'd like it to already have the host field populated with my last connected host. Is there any way to enable such functionality? Thanks in advance.
Don't know of a way to specifically do that, but you can set up browser bookmarks and/or desktop icons that will connect to specific hosts, if that's any help.  

For the former, create a bookmark that points to vnc://hostname.blah.com rather than the more usual http://hostname.blah.com.

For the latter, create a text file with the .command suffix (e.g. 'myvnc.command') that contains the single line:

open vnc://hostname.blah.com


which will start the screen sharing session when you double-click it in Finder. You can also drag it to your dock if you wish.