Sigma just announced they are releasing their
10-20mm F4-5.6 EX DC HSM lens and their
70-200mm F2.8 II EX DG APO MACRO HSM lens in the 4/3 mount.
The 10-20 is an interesting addition, being put in their with the likes of the 12-60 and 11-22. Might be a tick slower, but a good alternative for some.
The 70-200 is a really nice option to have now. Yeah the 50-200 is a FINE lens, and the 50-200 SWD (if it ever really appears) should be too. But this Sigma offers an option. And the Sigma has internal focusing.
Go to the "other" site if you want more info:
Sigma 10-20mm and 70-200mm for Four Thirds: Digital Photography Review