Since I bought a new camera (more on this later), I decided that nGallery is good but not enough to display pictures. It has some problems with displaying EXIF data, so I said that upgrade worths the time. I downloaded Community Server 1.1 and installed locally to see how smooth is the upgrade.
For blogs I've used DotText-CS-Converter 2.2 from http://kevinharder.com/blogs/kevin/archive/2005/06/09/dottext_cs_converter_22.aspx and it took me around 15 minutes to get my blogs working on CommunityServer. Upgrade was very smooth with no problem. Afterward I tweaked SiteUrls.config file to keep my naming scheme using subdomains and not subfolders (the way CS wants by default). Apparently it didn't broke anything and I'm very happy with this. Still I'll have to check for possible problems. One thing I'm missing is my old Windows XP skin, and I do not know if it will work with minor adjustments for CS. Still searching...
Tommorow I will update my galleries also, but here is a little bit of working, and I found a bug in the nGallery converter while testing on my local machine.