Well, I can set the forum to expire messages whenever I want them to die. I think I have these all set to expire after 1 year. I can make it longer, if you all think people will bother to go back through more than a year's worth of messages.
I am leasing my own web server now, with an 18 gigabyte hard drive. I only have one other domain to transfer over to it (my SerpenCo.com site - which needs to have a SSL certificate - long story....). I don't think we are in any danger of running out of disk space anytime soon. But the data is all stored in a mySQL database, which may have limits, but darned if I know what they might be!
I took a look at vBulletin's message board (which is using this same message board that is here, of course), and they are showing the following stats:
Members: 15,610, Threads: 43,200, Posts: 260,360
I think we've got a long way to go before we need to worry much about our traffic.
I'm thinking about offering banner ads to anyone whom is interested. Anyone got any gripes about me doing that? I would like this all to pay for itself somewhere down the line. I didn't get that web server for free.........