+1 on these:
. Vaguer searches, eg F class between SE Asia and Europe under $5000 between dates [edit - maybe you can do this already, I just don't know how]
. Business class does exist
. Carrier Filters + alliances ?
Emphasis on B-class functionality on the FT search page.
I like client side filtering. Power users seeking valued data can be expected to use appropriate, functioning browsers and to trust FC's code not to be malicious. I like datagrids ala .net/infragistics, componentOne, etc that allow me to explore from general to specific without gathering a new recordset.
I'd like to be able to save a number of select searches that I can resubmit with a simple click, or see in a BI report when accessing the page.
I am not opposed to paying a nominal rate for access and development costs, akin to KVS' rates.
I'm still wrestling with how KVS, et al, compliment or compete with your business model.
Finally, I'd like more YYZ-LCA styled fares, can ya' work on that one first?
PS: Can you publish a draft product roadmap at some point, so as to gather our thoughts on your thoughts of what we, the power users, requested?