update (30 July 2013): Kenya Airways has confirmed the codeshare agreement with Air Namibia. According to the press release, tickets already went on sale on 20 June 2013.
According to various news reports, the national airline of Namibia, Air Namibia, and Kenya's flag carrier, Kenya Airways, have signed a codeshare agreement. Under the codeshare agreement, Air Namibia will place its "SW" code on Kenya Airways flights from Lusaka (Zambia) and Johannesburg (South Africa) to Nairobi (Kenya), while Kenya Airways will place its "KQ" code on Air Namibia flights from Johannesburg (South Africa) and Lusaka (Zambia) to Windhoek (Namibia). We'll keep you posted as soon as we know more.