b. IMS's web page now lists a link to version 4.0 of its Twin Turbo driver.
Update: Earlier today, when I clicked on it, I got a "File Not Found" error. It reportedly now works. If you use Netscape, Paul Cheng recommends using the Option-Click technique (when selecting the link) to ensure a successful download.
c.NetFinder 1.1.2is now out.