Its is the right time for Yahoo and MSN to launch their PR toolbars..Obviously end users will still using google but definately if u analysize why yahoo lost out despite of having the early bird advantage. the reason was it search was not good and it use to display a lot of ads and users ultimately end up finding most irrelevant result. Than google came out and give good quality. But now i think all 3 yahoo, google and msn are user friendly and shows good results so over a period of time u cannt say that google will still be the no 1 search engine....So right time for yahoo and msn to take next level steps...