It's that time again... what lenses does M43 still need?

The M43 format continues to grow its lens range, indeed for many that is one of the best things about the format, but there are still a few gaps.

I know this question gets asked a lot, but given all the new lenses, I thought it was time to ask again! What new lens would you actually buy (as opposed to lust over)?

People talk about fast zooms, but personally I would really like to see a cheap wide-angle prime. Something like a classic focal-length 12mm f2.8 for £300 would be perfect, and sit well with the existing 45mm and 20/25mm (depending on taste) primes.

I can't imagine Oly will make one now though, given their expensive 12mm lens...