>I've also heard a lot of start-up people hang out in Sankt Oberholz (http://www.sanktoberholz.de/?lang=en), but I have no personal experience on that one.

Coming from Tallinn to see Berlinale in February, I had a misfortune of not having a desk in my hotel room during my stay there. Thankfully, St. Oberholz was just around the corner. I spent most most of the days working there and met many great people from artists and art curators to programmers and entrepreneurs, and it seemed that about third of visitors came from Denmark/Sweden/Iceland and the US/Canada. As much I could gather, Oberholz was the place were tech people could work when they didn't have a office space for themselves or wanted some rest from their primary offices. The place is overcrowded most of the time so you don't have a luxury for your own private table, and more often than not, you'll have to ask for a place at someones table. They also provided almost decent wifi, which really isn't really the norm for the majority of places in Berlin.

On the broader perspective, Berlin is a great city with a good vibe attached to it, and I have been thinking of moving there for a while now.

There are also a number of other hacker-spaces and the Chaos Computer Club. There is one hacker space devoted entirely to the intersection between Textiles and Electronics. Just a warning, Berlin is not the valley. It is it's own unique and awesome thing. A huge proportion of the hacking community couldn't care less about start ups. But it is a large community, and I can't speak for everyone.

Do you have any links for the other hacker spaces in Berlin? I'll be travelling there in the very near future, and will likely need a space to work while I'm there.

I'll be there for a month, and don't mind paying a membership fee. I already checked out c-base, co.up, and Sankt Oberholz, linked above. They look promising, but more information can only help.

Another popular coworking café in Kreuzberg is The Nest, http://cafenest.de.

Thanks. Would be great if anyone else has anything to add. Have been looking into this for a while and this has been very useful.