Cool, yeah new 64-bit iLife would be cool, just cos. A graphics app would be a nice addition also - would be interesting to see what a first release would look like.
Having been working with iWork in a Windows-heavy environment for about 4 months now, the only sort of update for iWork I'd really care for is improved compatibility with MS Office. High on the list would be exporting fonts properly for Windows, ability to save as .docx, etc., NOT adding a line after every table on every save as .doc for Pages, ability to change default font in Numbers from Helvetica Neue (which no one on Windows has ffs), handling of Gridlines vs cell borders in Numbers so that it works with Excel, better handling of PowerPoint Master slides on import and export.
Of course I've submitted all that as feedback, so it should happen

.
Edit: oh, and, seeing as they just irked me again, I add: support for > 256 columns, 65535 rows (and significant speedups to boot), and not messing up sheet names on export to Excel.