Westhost provides budget web hosting (based on their Sphera VPS technology) and dedicated server plans. Their standard VPS hosting accounts range in price from around $4 to $25 for high spec business accounts, however they usually offer a 'special' medium cost plan (around $10) that gives the best price / feature combination.
Support is 24/7 via Live Chat (IM) and toll free calls within the US. They were recently acquired by a larger UK based hosting group UK2.net (November 2008) and have announced that this will not adversely impact their current plans, support or staff count but will eventually allow them to begin offering plans in other locations other than their Utah home base.
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West host is unusual in that their client/reseller hosting control panel is developed in-house and the Sphera VPS system they use has been heavily customised by them over the years, with an all-client upgrade to a new Apache 2 based VPS system in late 2007 / early 2008. Their VPS accounts are very cheap compared to 'standard' Xen or Virtuozzo VPS systems at other companies, but unlike those systems Westhost's VPS does not offer full root access. This means that advanced installations (virus scanners, linux core updates etc.) are not possible without paying Westhost support to perform the installation for you. However, applications such as the PostgreSQL database, CVS, SVN, virtually all Perl/PHP/Python libraries, frameworks etc. can be installed on a WH VPS without any problems. Queries about what can be installed can be put to Westhost directly (http://www.westhost.com/contactus.html) or addressed to the active and open client forums (http://forums.westhost.com).
However, in every case all the Apache, MySQL and PHP / Perl / Python / Ruby-On-Rails configuration files can be easily modified even on the low end hosting accounts - a big advantage over shared hosting.