I absolutely can visit Moscow! I'm waiting to receive more info on my itinerary but I expect I'll be able to make it out to Moscow sometime during the last week of May/first week of June.
That would be great if you come! Here is information regarding Russian visas. You can easily get visa invitation from tourist company and I can provide with all information about Russia.
Cat, who has volunteered extensively at CFAR (and taught at CFAR), will be visiting many cities in Europe over the coming months.
She is awesome.
Also, the list of cities that she is visiting will probably be determined in the next few days.
If you'd like to have her visit your LW meetup group, share some of our classes with your meetup, and generally bring connections back and forth... comment below, or PM her (or me)! I suspect this can be a lot of fun, and useful as well. Offers of couch space and similar are also appreciated.
For now this is just for Europe, probably, but no harm in touching base from other cities as well; it's possible she'll visit elsewhere later.