We've seen a few cautionary articles crop up on the web recently advising network administrators to take the plunge with their eyes wide open.
Here, for example, is what Tim Higgins of SmallNetBuilder had to say about mixing 11n with 11gat least with the first crop of 11n products.
"I'm no longer recommending that you go for dual-band dual-radio products if you want to move now to draft 11n. The main reason is that the potential upside isn't enough to justify the high cost, especially if you have a large installed base of 802.11b/g devices.."
The entire SmallNetBuilder article is available at www.smallnetbuilder.com/content/view/30396/100/1/2/.
While there is no doubt that 11n is going to create a lot of new applications once the standard is finally approved, people are taking a wait-and-see attitude on the pre-standard products.