Pentax has announced rebates on their DSLR kits, flash units and lenses. The rebates promo will run through March 27, 2007.
For example, you get a rebate of $200 if you buy a Pentax K110D kit complete with a P-DA 50-200mm lens and AF360FGZ Flash. If you buy the flash only, you get a rebate of $25.
The Pentax smc P-D FA 100mm F2.8 Macro lens has a rebate of $100 and the Pentax P-D FA 50mm F2.8 Macro will give you back $50.
See link below for a full list.