The Speed Caching Engine is a perfect choice for load balancing and tailored to meet very large blog and forum hosting.
This powerful caching engine is fully compatible with Wordpress blog software built on open source and propiertary software to deliver performance exceeding millions of daily pageviews and over 450Mbps of burst bandwidth (600+Mbps using Gold Edition).

TheSpeed Caching Engine can be configured to fully host Wordpress blog(s) with phenomenal performance or load balance requests up to 250 back-end wordpress hosting servers with static content caching enabled or disabled.
Yearly management plans:
Silver: $1200 (included for 1 year after the engine purchase)Standard Wordpress blog
server tuning and optimization.
Includes: Apache, MySQL, Linux and light
caching set-up and configuration. FreeBSD, Centos, Fedora, and RHEL platforms are supported.