Seems Lao Airlines have a webmaster again and the website has been updated/fixed up ... a bit.
Interestingly there is a section on the front page detailing some promotional fares for travel up to 28 October 2009. Sample includes (all fares USD, exclude taxes etc):
Chiang Mai - Luang Prabang: $100
Luang Prabang - Hanoi: $105
Vientiane - Hanoi: $110
Udon Thani - Luang Prabang: $79
Bangkok - Savannakhet: $95
Luang Prbaang - Siem Reap: $158
There are more fares listed on the Lao Airlines website.