- Use MicroSoft-loving TrueType fonts in your artwork: replace Helvetica with Arial, etc...
- Export the OmniGraffle file to PDF via your favorite method -- export, print to PDF, Acrobat distiller, whatever.
- Open the PDF if Adobe Acrobat Pro and select "Reduce PDF File Size." For my art, this usually creates a larger file rather than smaller, but if you skip this step, Illustrator mangles the file.
- Open the (new, not-smaller) PDF file in Illustrator.
- Verify that the text is not completely insane
- Export from Illustrator as "Legacy Illustrator EPS;" I found that Illustrator 10 worked OK.
- Import the resulting EPS file into Word X or 2004. You should see a low-res bitmap preview. You can verify the high-resolution result by printing to a PostScript printer (Word's Print Preview feature is not sufficient).
[robg adds: If anyone can come up with a better solution than the above, please add your comments! I don't own Illustrator and don't use vector artwork in Word, so I don't have anything much to add to this one!]

