[NoeJeko]

Shared hosting isn't the best for an active forum. If you're running into this issue, you should look at getting a dedicated host.

I rented a single proc dual core Xeon from ThePlanet for $159/month. If you're at the point you need a dedicated host, then you can probably recoup a lot of that cost from ads. I was breaking even on ads until I had to upgrade my box because a single proc couldn't handle 400+ concurrent users.

In addition to Google's stance on cloaking, you can actually open a security vulnerability here. If someone spoofs their useragent string and you're not checking against IP addresses - they can access your site at whatever level you allow the spiders. I've had users try it on my board and I don't even use this method.