Notice they didn't reveal the MSRP..
I've been investigating Hybrid devices recently, Dell already have a Hybrid EQL available, I believe it had 7 SSD's and 17 600GB 10k SAS drives - MSRP is £55,000. Even with a decent discount, you'd still be looking at £35,000.
Its eye watering...
But there is some light for those on a budget, the Dell MD3220i will get SSD Caching at some point in the next few months. Additionally if your willing to forgo "brand", Huawei have a Hybrid SAN, which you can get with 4 SSD's and 20 600Gb 10k HDD's for less than £23,000 (Its also a Hybrid FC/ISCSI)..