Jet Airways will launch a new service between Mumbai and Colombo starting on the 5th November 2010. The flights will be daily and brilliant for those connecting out of other cities such as Johannesburg. Previously Emirates owned the route but I see Jet Airways closing all of Emirates niche markets soon.
Onboard Jet Airways is fairly decent, entertainment is good but legroom a little dodgy. Otherwise good value for money.
One last thing, SAA and Jet Airways are partner Airlines, unfortunately you cannot redeem miles on a Jet Airways flight out of Africa on SAA Voyager Miles.