Good news! ... All of these issues are easily resolved.
There are several good ways to unblock web sites. The solution for you particular case depends on how you are being blocked. Whatever you do, don't use free open proxy services to do this. They are almost universally designed to steal your information and allow access to your computer from the outside. They will spoof you and, in the worst case, access your computer and launch hacking attacks through it. Even the few good proxies that exist are easily blocked, are usually very slow and will only unblock your browser -- not secure instant messenger and other non-browser applications. Finally, your data is not encrypted -- leaving a trail of your browsing history for the people who are blocking you.
A Personal VPN is the ideal solution to unblock web sites, IP soft phones and instant messenger. The VPN provides a secure, encrypted connection for all of your data. Your ISP cannot see what you are doing or where you are browsing. They have no idea you are using an IP phone so it is not blocked. It installs on your computer and goes everywhere with you. See this page for our list of requirements for a good VPN service.
The VPN Appliance is a router-based solution for home or office. Plug your hardware-based IP phone into one of its Ethernet ports and your calls go through. Use the wireless-G or the Ethernet ports to plug in any number of computers. The ultimate plug-and-play solution for you to unblock web sites and IP phones.
In cases where you can't install the VPN software or your network prevents new connections or additional IP addresses, the Flash Drive VPN is the answer. All of the web browsing history and operating system is on the flash drive. Unblock web sites through the use of a virtual machine. Your host computer runs the virtual machine on the flash drive independent of the machine's normal operating system. Connections are made through the virtual machine (which has no firewall rules) and forwarded through the host machine's IP address and internet connection.