Where to get a host to practice live

I've noticed some hosting companies provide ASP.NET hosting for version 2.0 and
others for 3.5.

 What exactly is the difference and does it matter?

 What are some cheap hosts offering this so you can practice.

I know Brinkster does for about $20/Mo. Any better ones?

If you don't need the new 3.0/3.5 technologies everything you need is in 2.0
Overview
.NET Framework 3.5 builds incrementally on the new features added in .NET
Framework 3.0. For example, feature sets in Windows Workflow Foundation (WF),
Windows Communication Foundation (WCF), Windows Presentation Foundation (WPF)
and Windows CardSpace. In addition, .NET Framework 3.5 contains a number of new
features in several technology areas which have been added as new assemblies to
avoid breaking changes. They include the following: 


Deep integration of Language Integrated Query (LINQ) and data awareness. This
new feature will let you write code written in LINQ-enabled languages to filter,
enumerate, and create projections of several types of SQL data, collections,
XML, and DataSets by using the same syntax. 
ASP.NET AJAX lets you create more efficient, more interactive, and
highly-personalized Web experiences that work across all the most popular
browsers. 
New Web protocol support for building WCF services including AJAX, JSON, REST,
POX, RSS, ATOM, and several new WS-* standards. 
Full tooling support in Visual Studio 2008 for WF, WCF, and WPF, including the
new workflow-enabled services technology. 
New classes in .NET Framework 3.5 base class library (BCL) that address many
common customer requests.

Manashosting.com gives free hosting.

http://www.qsh.eu/ provides free hosting for one year

Manashosting has one of the worst reputations in the market.

amritrr:

Manashosting has one of the worst reputations in the market. 

I agree... There have been many incidents reported about them over a period of
time now..