It's taken them longer than expected, but hot on the heels of their Eye-Fi Pro X2 WiFi-enabled SDHC memory card comes the general release of Eye-Fi Center. Announced back at CES 2010 in January, the new app supplants the current web-app for management of one or more Eye-Fi cards together with adding in new media sharing functionality.
There are in fact two elements to the new Center, one a native app and the other an Adobe AIR app. They're both compatible with Windows XP, Windows Vista, Windows 7 and Mac OS X (10.5 & 10.6). Rather than just being able to share photos saved onto the Eye-Fi card itself, Eye-Fi Center also allows you to import photos from other sources - whether your archives or non-WiFi cameras - and share them too. It's a free download here.