In preparation for the upcoming Ivy Bridge processors, motherboards with the new Intel Z77 chipset have been released. Using Socket 1155, these boards are compatible with Sandy Bridge processors that use the same socket. So if you have a Core i5 2400, one of the more popular i5 processors, you'll be able to use that in the new motherboard. Upcoming Ivy Bridge processors will work in it as well.
There are quite a few new motherboards with the Z77 chipset, including offerings from GIGABYTE, MSI, ASRock, ASUS, Biostar, and more. Aside from Ivy Bridge support, one of the nice features of the Z77 chipset and Ivy Bridge processors is the support for PCI Express 3.0, with 6Gbps speeds.
If you're interested in reading about performance, here's a good roundup of quite a few Z77 motherboards, complete with performance tests (although the tests are done with a second-generation Core processor, so Ivy Bridge performance will probably be better). If you feel like reading some press releases, here are some from MSI, ASRock, and GIGABYTE. You can find the boards for sale now at the usual places.