Re: Expect to pay for hosting that will run WordPress MU?
um….it depends on what you want and need.
We used to run WordPress MU on site5, which is shared hosting, but they do the wildcard thing for you. It was $240 for 2 yrs ($10/mo) and runs WordPress MU well, if it is a small site with not too many super active bloggers or tons of blogs. It has unlimited Ram and bandwidth, but we had complications once we started to grow, and had to move.
We are now on Slicehost, which is VPS, it starts out at $20/mo (no contract) for 256MB of Ram and 100GB bandwidth, which barely runs WPMU. Upgrade to $38/mo for 512MB and 200 GB bandwidth and you should be fine for a relatively small site. We upgraded to a 1GB Ram and 400 GB bandwidth for $70/mo, for a somewhat large site, and it runs fine. Plus you can upgrade and downgrade at anytime, and it takes 5 mins and they do it all for you.