Alongside the release of their X58 SuperComputer motherboard for the Core i7 platform, ASRock has just added another X58 based offering into its lineup which is calls the X58 Deluxe.
This variant is a more cost-friendly alternative to the SuperComputer with very slight trimmed down features and accessories that many people probably wouldn't use anyway. The changes include just a single Gigabit Ethernet interface and no (2S) SLI interconnect bridge which is now redundant for common two-card SLI setups anyway.
However, all the important features are left in place including full CrossFireX and up to 3-Way / Quad SLI graphics support via its four PCI Express x16 slots, up to 24GB of DDR3 memory and 8-channel HD Audio.
Although it's yet to be officially released by ASRock, you can already see a listing for it on their website here.