Tiago Dionizio wrote on comp.lang.tcl:  I have ... written a [SQLite] based
[TclVFS] for personal use ... and it seems stable.  Used it to build a tclkit
based app without problems.  (minor text changes and hyperlinks added by [DRH])

Here is a link to the script file:
http://mega.ist.utl.pt/~tngd/tcl/sqlite3vfs.tcl