A new version of Gmail Drive (http://www.viksoe.dk/code/gmail.htm) is out, the tool that creates a virtual filesystem on Win machines around your Google Gmail account. 1.06 resolves a problem related to a change in an url redirection of the Gmail service.

Another similar, however web-based, service is XmailHardDrive (http://www.xmailharddrive.com/). You know how it is... never leave your username & password in places you cannot fully trust.