It's a great idea, and we ARE working on this facility, not through the HUBB, too hard to organise, but the new software is very much in progress and we will have this sort of thing coming on line through the summer.
Currently for local knowledge tidbits we depend on the Community Pages - see the Community section on left menu, and then Contact - and you'll see some of the Communities have "more on..." this takes you to a page on the Community and often details on the area. If you need specific info on a particular area, contact the Communities!
Finally there is also the Country pages, accessed from the Planning section. Not a huge amount there yet, but we are always looking for contributions and will post there as we get it. Sam Manicom has posted a fabulous article on "how to do India", and the Turkey page is great too.
Seek, and ye shall find.
Inspiring, Informing and Connecting travellers since 1997!