Helmut,
I fully realize that the current situation might look a bit uncomfortable for users. I also have very bad experience with projects that are "for community", "for free" and "done in spare time" and suddenly just shut down because a guy said I do not have any more time to run this. However I have not started Wikidot as a spare-time project nor in order to learn how to program websites. There always was a plan behind it. And — which I am very proud of — this plan is still fine.
Indeed we are currently converting the "one-man-effort" into a "real company", with real investors, professional servers behind and a team of people behind the product. We have also looked at a bunch of successful open-source and commercial projects (like Zimbra, Wordpress, Zoho etc.) and have a very clear way of becoming a successful company. The stage Wikidot has been in the last months you could consider as spin-up.
There are several ways a product like Wikidot can get money from and you really should not worry about it. One of them I have just unveiled: partnerships with advertising companies. It has been also discussed some time ago here on forums. There are other ways too which I would rather not tell now, but this could include pro-level hosting of wiki farms (quite an obvious move) and services around the software itself that is going to be released. Alternative way for web projects is always: grow, grow, find investors, grow grow, find investors, grow, sell the project to a bigger player. There are several projects that followed this path (like reddit.com or kiko). In either case users of Wikidot should not loose.
I really understand any doubts but I deeply believe Wikidot is and will be a reliable platform. There are of course things that needs to be fixed or changed but so far we are doing very very well sticking to the plan.
michal