Was quite excited about this when Hexus TV did a feature back at CES, and it's currently available at retail:
Sapphire FleX 5770
You can use both DVIs and the HDMI simultaneously without an active dongle to get 3 way eyefinity, and you can hook up an active dongle (e.g. the £20 sapphire one
) - or a native DP monitor, obviously - to the DP to get a 4-way set up from a single card. Sure you pay a premium over a standard 5770, but some might say that £50 was worth it to get 4 DVI monitors running off a single card...