Although the Thincom can work with any online application like AvantGo, it comes with three applications stored on the module: Browse-it, MultiMail, and Online.  Browse-it, by Puma Technology, is a web browser that uses a proxy server to help format websites appropriately for the Visor's 160x160 screen.  Browse-it is very similar to ProxiWeb, and it should be, as Puma purchased that company.  In fact, I had ProxiWeb installed on my Visor, and Browse-it listed my ProxiWeb bookmarks along with its built-in bookmarks.

The other two applications, MultMail and Online, are shareware and must be purchased separately.  On one hand it seems strange to include applications that you must purchase, but it also keeps the price of the Thincom down.  Multimail by Actual Software is only a 10-day demo of a full-featured email application for the Palm OS.  Online by Mark/Space Softworks is a terminal emulator that has a splash screen letting you know it's a demo; this is much better, because it allows you to test the software longer.  All three applications are supported by the authors, not Card Access, and are removed when the Thincom module is removed from the Visor, although the application data remains.

So how well does the modem part of the Thincom work?  Very well.  The battery doesn't seem to drain too much, but make sure you don't look at the meter while using the Thincom.  As with other modem modules, the Visor's battery meter drops while connected, but on the Thincom, this drop is more dramatic.  My Visor went from 54% to 19% after about 5 minutes of use -- however, once I disconnected, the meter gradually went back up to 52%.  Browse-it worked great, allowing me to pull up VisorCentral in less than 10 seconds.  I wish the Thincom's Status Screen would have had a Disconnect button, but most online applications have Disconnect as a menu option, so this isn't too great of a concern.  As I said earlier, the fact that there is a Status Screen in the first place is a great addition.