@Reyn,
Thank you for checking that. It kinda makes sense, to not allow you to infinitely vote things up and down. Every time you do that, every time you vote, it's another line in the database. If 100 people do this 100 times on 100 topics in 100 days, you can see where that kind of thing (which, let's face it, is pretty minor versus things like being able to add new posts or topics -- more lines in the database) could degrade system performance very quickly.*
Re PMs and Updates -- my understanding is they are being considered carefully and worked on, I believe on more of a priority basis (but priorities can change as resources become available {or not}) because of their value to new users.
*PS I'm
not telling you not to vote, post, etc. Go ahead and use the site as you desire! We want to spread those 100 million lines in the database (if you multiply all those 100s I listed above, that's the number that you get) among lots and lots and lots of people. Including all of you!