The anti macro-evolution debate is also flawed, as we've observed speciation in controlled conditions.
http://en.wikipedia.org/wiki/Speciation#Example_of_three-spined_sticklebacks
A good article on the matter.
(from another section, the shortest example I can find - but it has many others).
One example of evolution at work is the case of the hawthorn fly, Rhagoletis pomonella, also known as the apple maggot fly, which appears to be undergoing sympatric speciation.
Different populations of hawthorn fly feed on different fruits. A distinct population emerged in North America in the 19th century some time after apples, a non-native species, were introduced. This apple-feeding population normally feeds only on apples and not on the historically preferred fruit of hawthorns. The current hawthorn feeding population does not normally feed on apples.
Some evidence, such as the fact that six out of thirteen allozyme loci are different, that hawthorn flies mature later in the season and take longer to mature than apple flies; and that there is little evidence of interbreeding (researchers have documented a 4-6% hybridization rate) suggests that sympatric speciation is occurring. The emergence of the new hawthorn fly is an example of evolution in progress
Not that I expect creationists to read any of it, they stick to insular websites written by people with a clear pro-creation agenda. You can't use reason to drag somebody out of a position they arrived at without using it themselves.