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Look at the forum rules:- Participants may not direct others to contact them regarding their product or services or future (possible) products or services, or any product or services they are, or have been, associated with.
Both LunarPages and Host Gator offer unlimited subdomains. I haven't been with either of them long enough to offer much of an opinion. But they seem to be very good from opinions of folks at this forum and other sites. So far, I haven't experienced any problems and hope it stays that way.