There's not a great deal of fun to be had with mining my friend, especially when it's not profitable! If you're serious about mining then you will need very expensive equipment and be prepared not to see a return, this is the harsh reality of mining today. I wish you the best of luck though, you can pick up some cheap second hand mining hardware in the auction section.
Who said fun and profitability had anything to do with each other... if you only look for your fun in profitable things then, no offense, but I feel sorry for you...
Maxman: if you find/solve a block while solo mining you will get 25BTC, but only with solo mining, I don't think there's a difference in the meaning.
Solo mining can take a long time to find a block though, depending on how many hashes you have (and luck etc.), but as you're doing it for fun I don't think solo mining is worth it on a small budget. You could always use p2pool which is as close as you'll get to solo mining with regular enough payouts, so give that a look.
Hope you enjoy mining if you do join