I like the fact that you can mine other currencies concurrently with your bitcoin mining on Bitparking. It's like a little extra cash at the end of the month when I combine them and trade them for BTC's
I have used Vircurex to generate wallets for the other currencies that are mineable on Bitparking and have the payments sent there. I found it just to be so much easier that way, don't have to frick around with all different clients etc etc to work your 'coins'.
Here is a link if you are interested.
https://vircurex.com/welcome/index?referral_id=263-4573my Refid is 263-4573 if you wish to use me as a referral. you should get discounts on your trading there too.
once a month or whenever, I will trade the other currencies I have accumulated for BTC, or play the market with them. I recently did a deal where I got a bunch of namecoins for 2.5 cent each then recently sold them for 6 cent each.
Of all the pools, Bitparking seemed to have the lowest fees. The ability to mine other coins was icing on that cake.
I do not know of any other mining pools that allow you to mine 4 different currencies at once. If there are any, please let me know.
Some people may not care for that. If that is the case, then you may want to switch to another pool if the fees here seem too high for you.
Aaron