i hosted with them once before. they support just about everything and have low prices. the only downtime i experience (with their 99.5% uptime guarantee) was this one night about 2:00 am for about 4 minutes.
they have 2 subdomains but allow wildcards.. for a one-time low fee. i had wildcards on and used a script to make the wildcards just like subdomains using subfolders.