I think ur idea is great. I'm an Aussie who has just moved from the UK where I have been living and one of my big things I know i"m going to miss is my social network.
I have a handful of wonderful singaporean friends here and I love them to bits but moving to a place that is different does require a little bit of a local expat network.
You do need to vent, share experiences and have people tell you it will be ok.
When my fiance passed away last year I spent a lot of time on a widows forum- not because my friends were amazing support but just becuause there were things they couldn't relate to...
I'm only 2 days into my time in Singapore but have had tears both nights and while i know this is an amazing place with so much to offer catching up with some other expats and having a few drinks/ dinner / what ever and sharing the eperience would also be amazing!
Essentially this is an epat forum where newbies like me can come along and find the support that moving to a new city might need!