I would expect the VBGrid to ultimately be a seperate OCX.

1 Question - how API compatible with the flexgrid will it be?

Also - just like to point out you've single handedly:
- Replaced all VB's Common Controls with updated Unicode Compatible replacements
- Made Multithreading easy in VB
- Will have replaced the flexgrid (arguably the most used control beyond the common controls)

All open source... Quite epic as far as classic VB goes.

Cheers!