I’ve been hearing more and more from Ask.com lately. The other day a guy from work told me he sis a side-by-side experiment doing some search terms and found Ask.com had better results than Google. Hear on Search Engine Roundtable they note a spike in referrals from Ask.com as well. I’ve been impressed with their site preview feature and the "save this image search result" feature.
Google is definitely my default search engine and I buy into Yahoo! My Web 2.0 in a big way (805 tagged and saved pages), but I am going to add Ask.com to the mix and see what happens.