The following articles seem to indicate that H1N1 Swine Flu was indeed created in a lab:
This article indicates that both the 1918 Spanish Flu and the 1976 Swine Flu originated from U.S. military bases.
2 of the 3 flu pandemics of the last century – the 1918 Spanish Flu and the 1976 swine flu scare – both started at military bases. Specifically, the 1918 flu started at Fort Riley, Kansas. The 1976 swine flu started – and never spread beyond – Fort Dix, New Jersey. It is unclear whether or not those bases conducted defensive biowarfare research.
In 2005, scientists thawed out samples of the 1918 flu and tested it. A new study says that the current swine flu is very similar to the 1918 flu, and that people who lived through the 1918 epidemic have immunity to the current flu.