'Proxys / Yahoo Non-Download Sites'?

Hey guys, Ok. Well basically, I'm a student at college who's taking a course in National Diploma IT so I really shouldn't be asking this but O'well. I've been desperate to talk to my Girlfriend whilst I'm at College because messaging is cheaper then texts lmao, I've crunched down about �90 so far. My College has basically blocked most of the Proxy's I know, I've shut down their Filter system twice and got threatened to be kicked out if it happens again lol. Great 'eh? So I'm looking for a byp of their Filter which is perhaps new or undiscovered yet by them. I need to get onto Buddy or a Web-Based Yahoo basically so if anyone can help me, I'd appreciate it alot. A list of sites is perfectly fine, I'll be leaving for college in 4hours. Also if anyone knows a site where I can download a Yahoo messenger which is something similar to a web-based Yahoo or a text-based Yahoo Messenger which I could store on my memory stick that'd be great. Thanks in advance