One problem with trying to compete with Seals, which also has HU, is that there are a number of regularly scheduled tournaments on Seals and often the start times on OVP conflict with them. Especially without a two monitor setup (like I used to have before Black Friday), it is virtually impossible to play both sites at the same time.
It might attract more people to schedule events both before and after major Seals tournaments, or at the very least avoid conflicting times. For instance, a 10 or 50 chip freeroll for something to do on the half hour instead of the hour might get more Seals players (who are most of the BTC poker players at present).
When I've been there in a freeroll that attracted a number of people, a couple HU ring games usually tended to start up. Lately, though, I've just showed up to see two or three people and no games, while Seals is active.
Not sure how to advertise it. I've been very pleased with the site being snappy (perhaps because of few players) and cashouts being fast. If I'd had better luck recently, I'd have kept at least a couple BTC there at all times.
Thanks for your suggestions. One thing we hope is that our site would appeal to a lot of players on Seals, without competing with them per se. Well, obviously we'd be competing, but in a sense that helps both. (Since it's so easy to transfer BTC back and forth, and our cashouts are usually right away.)
You're right that playing both sites at the same time can be tough. Remember you can shrink the size of tables. (I'm sure you know this, but just speaking in general to everyone reading.) Shrinking tables and shrinking your web browser around them is the best way. If you have multitables on both sites, or a lot of tables on one site, definitely can be cumbersome.
Advertising is tricky, it's really expensive on a mainstream poker site like 2p2. If you want to help, you can mention us whenever it's appropriate on any forums you post on. We were (and are) hoping word of mouth would build up over time. The tough thing about HU is the games don't stick. So even when we had decent action brewing, games could quickly die. We definitely need a decent mass of players to make sure there's always action.
.. just kind of a guessing game right now and trying to figure out the best way to balance expenses. 
