Oh, yeah, sorry, forgot to post again after I fixed the Poll issue.
Thanks for letting me know about the MySql webstore bug you found. I just fixed it in my working copy.
Also fyi, there were some bugs in the schema creation scripts for MySql web store that I have since fixed, but depending on when you got the code from svn your tables may have some problems. Best to drop all tables with a ws_ prefix and remove the row for the webstore from the mp_SchemaVersion table, then visit /Setup/Default.aspx to re-install it to be sure its correct.
I have implemented the code for PayPal provider but haven't yet tested it or written the code to plug it in to the store. I'll be doing that soon. At the moment it only can use Authorize.NET. If you post some links to the documentation about integrating WebMoney, I'll take a look at it and see what is involved to integrate it.