I created a few paths in Inkscape and wanted to use them in PS CS4, so I saved it as .eps, but when I open it in Photoshop, the path information is not there. Has anyone had this problem, or do you have any ideas what I might be doing wrong?

Does Photoshop preserve path information in an EPS normally? Illustrator obviously would, but I'm not so sure that Photoshop does.

If Photoshop is letting your specify the size when you open, and it doesn't pixelate when you make it very large, then I would suggest that what you are experiencing is normal behaviour for Photoshop and EPS files.