Sorry, incorrect. There is clear and repeatable evidence that evolution is occurring in human beings currently. There was an article in either Scientific American or Discovery Magazine a couple years ago about a mutation that occurred in human brain chemistry within the last century that helps people deal more successfully with environments that have a lot of distracting stimuli that appears to be successful in that it is spreading through the population of the world. As of the writing of the article, about 20% of living humans now carry this mutated gene, whereas it was less prevalant 40 years ago and didn't exist 100+ years ago.
There have also been numerous experiments with microbes, etc. whereby mutations have been introduced which were likely to be beneficial or detrimental and the beneficial mutations DO spread through the subject population. This is repeatable evidence that evolution DOES occur and that it does work. You could also note the more mundane evidence of dog and other domestic animal breeding, although, of course, the manipulations of the subject populations are not according to a "natural" process but rather, to the whims of the humans controlling access to breeding partners.
On a related note, archeological (sp?) and geological evidence as to the age of the earth and the universe in which it exists is VERY consistent, repeated across the world and is so omnipresent as to be consistent with what is considered acceptable as proof of the theory. This evidence of the age of the earth also fits consistently with the evidence for evolution of species over the course of the time involved. 2 billion years is a VERY long time, long enough for processes that are very haphazard and slow to do a whole lot. Keep in mind that 2 billion years, roughly how long the earth has been cool enough to support organic chemistry, is 100 million human generations (assuming babies at age 20) and about a trillion microbe generations!